A Mac tutorial for beginners and PC users showing how to switch from Windows to macOS. This tutorial covers all of the basics of using macOS including the f. This content applies to Windows Virtual Desktop with Azure Resource Manager Windows Virtual Desktop objects. If you're using Windows Virtual Desktop (classic) without Azure Resource Manager objects, see this article. From the Apple menu in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it. Which macOS version is the latest? MacOS is a Unix based OS at it's core, just like Solaris, Linux or FreeBSD. Lots of money allowed Apple to create better than average GUI apps and interfaces. There is little magic in the Darwin. Mac OS is a completely capable OS that provides functionality and services similar to Windows or Linux OS. Some of the code base and features of Lisa OS have been incorporated in Mac OS. Mac OS is designed to operate on Apple manufactured PCs and by default, does not support x86 architecture. As of 2012, Mac OS released several versions, including Macintosh 128k, Mac OS 7, Mac OS X and Mac.
Updated on March 16, 2021
Apple has made huge inroads with Macs over the last decade. macOS laptops and desktops have become a popular choice across organizations of all sizes in what was once a market dominated by Microsoft® Windows® systems. However, while in many cases Macs may have become the preferred device for knowledge workers, the legacy, on-prem Microsoft Active Directory® (AD) solution has remained the identity provider, resulting in a disconnect for user and system management capabilities.
Managing Macs with Active Directory presents a number of challenges. The most imposing being the fact that Microsoft never designed AD to support Macs in the same way as Windows systems, nor does it appear that they are all that interested to do so. As the IT world shifts away from Windows to macOS and Linux, many IT admins are asking what are the best practices for integrating Macs with Active Directory.
Mac Management with Active Directory Falls Short
IT organizations have traditionally leveraged AD as their identity provider as well as their choice for managing Windows devices. Active Directory offers a number of user and device management capabilities as an identity provider for Windows users and systems. However, the majority of these management capabilities are not available for Mac (or Linux). This presents a few major issues for IT admins.
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The Need for Supplemental Solutions to Manage macOS
The first issue is the lack of full control and management for macOS users. In large part, user management capabilities are limited to user authentication and password management. That means admins often have to implement third party add-ons to have the same level of control for Mac systems as they do for Windows endpoints in a pure AD environment.
As Apple has continued to add more security features including their Secure Token functions, the ability to provision and manage users on macOS devices has become even more complex. This not only adds a lot of overhead for IT admins for user management, but also substantial added costs.
A Fundamental Miss: GPOs and Macs
The other issue is the lack of device management or MDM (mobile device management) capabilities for macOS systems. For example, one of the most powerful features of AD is it's Group Policy feature. Group Policy refers to a device management feature that enables IT admins to deploy commands and scripts in the form of policy documents that apply their settings to the computers and users within their control. (Technet) Microsoft calls these commands and scripts Group Policy Objects (GPOs).
While GPOs are certainly powerful tools, their effectiveness comes down to two factors. For one, they can only be applied to Windows systems. The other factor is systems must be directly bound to the AD domain. That doesn't bode well for Macs. Of course, Apple has driven hard on it's own proprietary approach leveraging the MDM protocol to manage Macs. With the release of BigSur, only IT management solutions that support the MDM protocol and are approved by Apple can manage Mac devices.
The lack of GPOs for macOS endpoints – or to be more specific, support for the Apple MDM spec – in an AD environment is only a side effect of a larger problem. While it is easy to forget in the modern heterogeneous IT world, Windows and macOS are competing operating systems. Therefore, it is safe to assume that Microsoft isn't going out of their way to make it easier to manage macOS systems on the same level as Windows endpoints any time soon. Of course, for a fee, IT organizations can leverage some of Microsoft's other IT management tools to support some Mac management functions. Those tools would need to be integrated with AD and still struggle to manage Mac user accounts. Microsoft has even gone so far as to partner with other Apple-centric MDM providers to cover for this weakness.
The simple fact is that Microsoft is not all that interested in providing support for a competing operating system like macOS (or Linux), even in this new age of Microsoft where they are seemingly playing more nicely in the market. So if you have an organization that is deeply entrenched with AD and yet you've got a fleet of Macs to manage, the question has become, 'What are the best practices for integrating Macs with Active Directory?'
Options for Integrating Macs with Active Directory
Currently, there are three major options for integrating Macs with Active Directory:
Manual Connection
Option 1 is to manually connect Macs to AD. This can be done through some configurations and settings. It isn't necessarily easy, nor scalable, but it can be done. What you don't get is deep management capabilities as well as the concept of GPOs for Macs nor the full user management capabilities as you do with AD for Windows devices. You'll likely need to manually provision users on to the machine.
Directory Extension Technology
Untouchable! mac os. Option 2 is to leverage a legacy directory extension technology. These solutions are enterprise caliber tools that are integrated on-prem to the AD server. Usually there are professional services involved and more infrastructure on-prem. These solutions are often expensive and further solidify the identity management architecture on-prem, often as IT organizations are making the leap to the cloud. Microsoft is seemingly recommending this approach with their partnership with Apple-centric MDM providers.
Cloud Identity Bridge
Option 3 is to utilize a cloud identity bridge. The JumpCloud AD Integration feature that comes as part of the cloud directory platform offers a particularly interesting example. This lightweight approach connects AD identities to virtually any resource that can't be directly bound to the Active Directory domain. That can include not only Mac devices, but remote Windows machines, Linux servers at AWS, single sign on to web applications, WiFi authentication via RADIUS, and much more.
The cloud identity bridge federates to a cloud hosted directory service. As part of that directory service, IT admins can have full user and device control over their Mac fleet. Further, through the JumpCloud Mac app, passwords can be updated on the machine and securely travel back to AD and elsewhere. The Mac app also avoids the pitfalls of phishing as the password is updated on the machine, not on a public website.
So What is the Best Practice?
Cloud identity bridges offer the greatest flexibility and allow an IT organization bound to AD to be more agile and adaptable as the modern office continues to evolve. JumpCloud's ADI capability is unique in that it also offers GPO-like capabilities (also known as Apple MDM services) native to its functionality. That means IT admins can set policies on Mac and Linux machines while AD remains the authoritative IdP.
If you would like to know more about the best practices for integrating Macs with Active Directory, drop us a note. You can also sign up for a JumpCloud Free account and start extending AD today to your Mac fleet. Machine at the heart of the world mac os. You'll receive 10 users and 10 systems free along with 10 days of Premium 24×7 in-app chat support. Feel free to contact us if you have any questions. Hot pocolate mac os.
Mac System Software
Mac OS was named by the company Apple as 'Mac System Software' in the beginning, a specially designed operating system only for 68K first Motorola processors. With own Macintosh hardware, Mac OS takes up a special role in the world of desktop systems. The first version was 'System 1' and appeared bundled with the Mac in 1984. The classic desktop is designed as a single user operating system and almost completely hides the full path to files and directories. The graphic representation is reduced to the essence. Overall the interface is very easy to use and does not need the right mouse button for user interaction. Mac OS does not include a command line interface.Starting with System 3.0, the used filesystem HFS was used officially, which does not different between uppercase and lowercase letters. System 5.0 was the first release to run several programs with the integrated MultiFinder at the same time. The operating system was programmed up to system 6.0 mostly in assembler and partially in Pascal and used a 24-bit addressing mode. Cooperative Multi-tasking could optionally be enabled in System 6. System 7.0 first supported 32-bit addressing. Thus allow the operating system can use more memory and more powerful programs. Since 1994 System 7.5 supported for the first time the PowerPC architecture and is optimized with the following Mac OS versions further on this architecture. With System software 7.6 the name was changed to Mac OS in January 1997.
The optimization of the operating system to the hardware has the disadvantage that the system software can not be installed on every Mac. Application compatibility to the Mac systems may also vary with each version.
2006 MacOS X was presented for the first time publicly on x86 hardware, Apple allows the use of Mac OS X only on specific intel-Macintosh systems. According to Steve Jobs Mac OS X have been developed since 2000 internally parallel for Intel and PowerPC processors. The version of Mac OS X 10.6.0 raised the optimization to Intel-based processors further, the new operating system is no longer available for PowerPC Macintosh or pure 32-bit intel processors. In return the user receives a pure 64-bit operating system optimized for performance on multiple processors. Even the GPU computing power itself can be used with specific applications.
The selection of software is focused on the creative industry and enables such as the professional graphic, audio and video editing. Office applications such as MacWrite, Microsoft Office, OpenOffice and 3D games are also available. The choice of browsers is large with iCab, Microsoft Internet Explorer, Netscape, Opera and Mozilla Firefox. StuffIt is the standard software for file compression.
System 6 (Mac OS)
Mac system software 6 came onto the market in 1988. It requires 1 MB RAM and can address up to 8 MB. The file system can organize hard disks up to 2 GByte with 65,536 files. Optionally applications run with the multi Finder in cooperative multitasking. For word processing are programs such as WriteNow, MacWrite II, and Microsoft Word 4.0 available.System 7 (Mac OS)
The system 7 was first available in May 1991. The new operating system needed 2 MB RAM, optionally it can be switched to 32-bit depending from the used hardware. Cooperative multitasking is now enabled by default, the addressable memory is no longer limited to 8 MB. In addition virtual memory can be enabled.New is the direct support of networks with file exchange, AppleScript as scripting language and display of colors. Balloons provide help for the user to use the interface. With aliases are icon links to files possible, regardless of the storage location locally or from the network. The TrueType fonts are scalable to any size.
The System Software 7.5 appeared in 1994 and requires at least 4 MB RAM. It was running both on 68k-Macs and Power Macintosh. In September 1996, the update System 7.5.5 includes all available bug fixes, Open Transport 1.1.2, current Ethernet driver and support for storage drive volumes up to 4 GB. With release 7.6 the company Apple changed the name for the operating system from System Software to Mac OS in 1997. At the 31. January 1999 Apple gave the Mac system software 7.5.3 public as free download.
Mac OS 7.6 can be installed on every Mac compatible computer, which contains at least a 68030 processor and supports 32-bit addressing. The 24-bit addressing is no longer supported. Performance is improved in the area of virtual memory and memory management. QuickTime version 2.5 offers better image quality and benefits of multiple processors.
On systems with 68040 or PowerPC processors partitions can be used of up to 2 TByte, systems with 68030 processor remain limited to 4 GB. Check of the disk after a system crash requires now much less time.
Mac OS 8
Mac OS 8 by Apple appeared in July 1997. As minimum requirements are specified a 68040 or PowerPC processor, 32 MB RAM and 120 MB of free disk space. The CTRL key is used to display a specific context menu for different actions. Finder in version 8 is now multithreaded and does no longer breaks other applications during the copy of files. The starting time of the operating system and applications is been reduced. As standard the browser software Microsoft Internet Explorer 3.0 and Netscape Navigator 3.0 are included. Inside of a TCP/IP network can shared files and printers accessed.With Mac OS 8.1 the filesystem HFS+ is included by default. Now informations are stored more efficiently on the file system and does less waste disk space in comparison of HFS. The limit of the partition size is depending on your hardware, the maximum size is now 2 TByte for all Quadra and PowerMac systems. The file system can handle up to 2 billion files with a current file size of up to 2 GB. PC Exchange 2.2 allows users the mount of DOS and Windows drives on your desktop. The supported file systems include FAT12, FAT16, FAT32, VFAT.
Mac OS 8.5 further optimized the stability and speed of the operating system, Sherlock is extended for full-text search in local files and Internet search wizard for the first time. Mac systems with 68k processors are no longer compatible with this version. The throughput in Ethernet networks has been increased, AppleScript is now up to 5 x faster than the previous version. The graphical display is accelerated by new QuickDraw routines. Copying files has become faster and increase the disk throughput. A tool for system maintaining detects and fixes errors on the file system automated. The 'Apple System Profiler' creates comprehensive reports about the used hardware and software.
Following applications are included in current version: Finder 8.5 QuickTime Pro 3, Open Transport 2, Internet Explorer 4.01, Outlook Express 4.01, Netscape Navigator 4.0.5, Mac OS Runtime for Java 2.0 and File Exchange 3.
Mac OS 8.6 requires 250 MB free disk space and 24 MB RAM. A new kernel is included which improves performance and added support for the PowerPC G4 processor. The ability of multitasking and multiprocessing has been optimized further and enhanced with new features.
UDF 1.5.2 allows reading and storing data to DVD-RAM and read of DVD-ROM media.
Mac OS 9
The operating system Mac OS 9 has been developed under the name Sonata and released to the 23. October 1999. The installation requires 32 MB RAM with virtual memory and a PowerPC 601 processor or higher. For models with G3 processor are at least 64 MB RAM recommended for optimal performance. The first G4 and iMac systems until summer 2000 are supported. The free disk storage should be 150 up to 400 MB depending on the installation type.50 new features are added in comparison to the previous version. This includes support for multiple users with password and access management for files and settings. The login is available through authentication by voice. Files can be stored encrypted. The operating system can automatically update itself via the Internet. You can back up all personal passwords with a master password. The integrated search engine Sherlock 2 is extended with language and search templates. The first version 'Carbon' API is available for new applications.
The following applications are included in current version: Finder 9.0, Mac OS Runtime for Java 2.1.4, Apple data security 2.0 and Open Transport 2.5.
Mac OS X
Different technologies like the Mach Kernel, NEXTSTEP and tools from NetBSD and FreeBSD found influence in Mac OS X to merge the previous Apple technology with UNIX features. The operating system core Darwin is open source and can be used also on x86 computers standalone. Mac OS X works with preemptive multi-tasking and includes beside the new GUI Aqua the classic GUI from Mac OS 9.Mac OS X 10.0 came out in March 2001. To install are 128 MB RAM (256 MB RAM starting from Mac OS X 10.3.9) and 1.5 GB hard disk space (3.0 GByte starting from Mac OS X 10.2) provided. Mac OS X 10.5 requires at least 512 MB RAM and 9 GByte of free disk space.
- 32-bit or 64-bit processing
- SMP with up to 32 CPUs
- needs a PowerPC G3, G4 or G5
- POSIX compatible
- HFS+ file system
Field of Application
- digital photography
- 2-D and 3-D animations
- video processing, streaming
- audio processing
- platform for DTP, web design
- office applications
Structure Information
- supports QuickTime/VR
- monolithic Kernel
- Read/Write FAT, FAT32, ISO9660, UDF
- well proven TCP/IP Stack
- graphical user interaction with the finder
- graphical representation by Quickdraw
- central password administration (Keychain)
Considerable performance and comfort improvements were carried out in version Mac OS X 10.1. The surface reacts quicker at user interaction, the system start was accelerated and the OpenGL performance increased noticeable.
Mac OS X 10.3 has now a GUI in metallic scheme and the optimized Finder. The use and access in heterogeneous networks was further simplified. Files can be provided with etiquettes, the compression format ZIP is now directly supported. 12 million MacOS X user were counted in October 2004.
According to Apple Mac OS X 10.4 brings more than 200 new features. Features are the fast, system-wide and index-based search function named Spotlight, the Dashboard for easy access to small programs (Widgets), the Automator for the simplified composition of Applescripts for the automation of tasks. The Web browser Safari in version 2.0 now contained RSS support, the QuickTime software was updated to version 7 with support for the H.264 video codec. Further novelty is the delivery at a DVD medium, an installation of CD-ROM is no longer possible.
First since the 10th January 2006 is MacOS X 10.4.4 next to the PowerPC version available for Intel based Macs. On the 6. June 2005 Steve jobs announced at the WWDC the switch to Intel processors. As further details became known that Apple had developed Mac OS X since 2000 internally also for the Intel platform.
Apple released the successor MacOS X 10.5
Usinex Mac Os X
, Leopard at the 26.10.2007. With more than 300 innovations MacOS offers the user an enhanced user interface with virtual desktops, a fast file preview and Dock with 3D effect. The Finder was revised, the expansion 'Boot Camp' for the installation of Windows on Intel-Macs is an official component now. As a file system ZFS is optionally available. For the surfing on the Internet the Apple Safari 3 Web browser is included. Backups can be made, managed and restored in a simple way with 'Time Machine'. Time Machine makes every hour the day automatically a file backup and every day a snapshot for the duration of a complete month. Lost files are recovered easily over the display of a dynamic time line of those snapshot. The security of the operating system and applications is improved by 11 enhancements. This are beside others the application-based firewall, signed applications, the use of ASLR (Address Space Layout Randomization) and Sandboxing for applications.Following applications are included in current version: Finder 8.5 QuickTime Pro 3, Open Transport 2, Internet Explorer 4.01, Outlook Express 4.01, Netscape Navigator 4.0.5, Mac OS Runtime for Java 2.0 and File Exchange 3.
Mac OS 8.6 requires 250 MB free disk space and 24 MB RAM. A new kernel is included which improves performance and added support for the PowerPC G4 processor. The ability of multitasking and multiprocessing has been optimized further and enhanced with new features.
UDF 1.5.2 allows reading and storing data to DVD-RAM and read of DVD-ROM media.
Mac OS 9
The operating system Mac OS 9 has been developed under the name Sonata and released to the 23. October 1999. The installation requires 32 MB RAM with virtual memory and a PowerPC 601 processor or higher. For models with G3 processor are at least 64 MB RAM recommended for optimal performance. The first G4 and iMac systems until summer 2000 are supported. The free disk storage should be 150 up to 400 MB depending on the installation type.50 new features are added in comparison to the previous version. This includes support for multiple users with password and access management for files and settings. The login is available through authentication by voice. Files can be stored encrypted. The operating system can automatically update itself via the Internet. You can back up all personal passwords with a master password. The integrated search engine Sherlock 2 is extended with language and search templates. The first version 'Carbon' API is available for new applications.
The following applications are included in current version: Finder 9.0, Mac OS Runtime for Java 2.1.4, Apple data security 2.0 and Open Transport 2.5.
Mac OS X
Different technologies like the Mach Kernel, NEXTSTEP and tools from NetBSD and FreeBSD found influence in Mac OS X to merge the previous Apple technology with UNIX features. The operating system core Darwin is open source and can be used also on x86 computers standalone. Mac OS X works with preemptive multi-tasking and includes beside the new GUI Aqua the classic GUI from Mac OS 9.Mac OS X 10.0 came out in March 2001. To install are 128 MB RAM (256 MB RAM starting from Mac OS X 10.3.9) and 1.5 GB hard disk space (3.0 GByte starting from Mac OS X 10.2) provided. Mac OS X 10.5 requires at least 512 MB RAM and 9 GByte of free disk space.
- 32-bit or 64-bit processing
- SMP with up to 32 CPUs
- needs a PowerPC G3, G4 or G5
- POSIX compatible
- HFS+ file system
Field of Application
- digital photography
- 2-D and 3-D animations
- video processing, streaming
- audio processing
- platform for DTP, web design
- office applications
Structure Information
- supports QuickTime/VR
- monolithic Kernel
- Read/Write FAT, FAT32, ISO9660, UDF
- well proven TCP/IP Stack
- graphical user interaction with the finder
- graphical representation by Quickdraw
- central password administration (Keychain)
Considerable performance and comfort improvements were carried out in version Mac OS X 10.1. The surface reacts quicker at user interaction, the system start was accelerated and the OpenGL performance increased noticeable.
Mac OS X 10.3 has now a GUI in metallic scheme and the optimized Finder. The use and access in heterogeneous networks was further simplified. Files can be provided with etiquettes, the compression format ZIP is now directly supported. 12 million MacOS X user were counted in October 2004.
According to Apple Mac OS X 10.4 brings more than 200 new features. Features are the fast, system-wide and index-based search function named Spotlight, the Dashboard for easy access to small programs (Widgets), the Automator for the simplified composition of Applescripts for the automation of tasks. The Web browser Safari in version 2.0 now contained RSS support, the QuickTime software was updated to version 7 with support for the H.264 video codec. Further novelty is the delivery at a DVD medium, an installation of CD-ROM is no longer possible.
First since the 10th January 2006 is MacOS X 10.4.4 next to the PowerPC version available for Intel based Macs. On the 6. June 2005 Steve jobs announced at the WWDC the switch to Intel processors. As further details became known that Apple had developed Mac OS X since 2000 internally also for the Intel platform.
Apple released the successor MacOS X 10.5
Usinex Mac Os X
, Leopard at the 26.10.2007. With more than 300 innovations MacOS offers the user an enhanced user interface with virtual desktops, a fast file preview and Dock with 3D effect. The Finder was revised, the expansion 'Boot Camp' for the installation of Windows on Intel-Macs is an official component now. As a file system ZFS is optionally available. For the surfing on the Internet the Apple Safari 3 Web browser is included. Backups can be made, managed and restored in a simple way with 'Time Machine'. Time Machine makes every hour the day automatically a file backup and every day a snapshot for the duration of a complete month. Lost files are recovered easily over the display of a dynamic time line of those snapshot. The security of the operating system and applications is improved by 11 enhancements. This are beside others the application-based firewall, signed applications, the use of ASLR (Address Space Layout Randomization) and Sandboxing for applications.Open Group certified MacOS X 10.5 according to the standard UNIX 03 in November 2007. MacOS X is the first free BSD derivative with such certificate to bear the name UNIX officially. The certification guarantees the use of UNIX standard implementations to porting UNIX applications easily.
The first update with bug fixes was released with Mac OS X 10.5.1 by Apple on November 15th, 2007. It contains general bug fixes for the operating system to improve stability, better compatibility and safety. Mac OS X 10.5.2 cames with 125 bug fixes and smaller optimizations on January 24th, 2008.
Usinex Mac Os Catalina
Mac OS X 10.6 is a Mac computer with Intel Core 2 Duo processor with at least 1 GB memory and 5 GB free space ahead. This operating system no longer exists as PowerPC execution. Apple placed the focus development on performance and stability. It supports up to 16 TByte memory, it is optimized for multi core processors, and is a pure 64-bit operating system. With the technology OpenCL graphics processor can speed up in specific applications calculations.Apple released macOS 10.12 as free update on 20th September 2016. The new operating system brings the personal assistant Siri to desktop computers. You can also Auto Unlock with your Apple Watch to unlock the computer automatically. The storage management has been optimized to e.g. free up local storage space and easily get rid of duplicate and obsolete files. The Universal Clipboard allows you to copy and paste images, video, and text between all supported devices. Beside of the HFS+ file system you can use the new file system Apple File System (APFS) as a developer preview on data volumes only. Highlights of APFS are e.g. native encryption, optimization for Flash/SSD storage and the Apple software ecosystem. It is planned that APFS will be the default file system for all Apple products in 2017.
Mac OS 1.0 Desktop | Mac OS 2.0 Desktop | Mac OS 3.0 Desktop | System 6, Macintosh Finder |
System 6, system directory | System 6, system control | System 6, find file | System 6, Apple menu and scrap book |
System 7.5.3, Desktop | System 7.5.3, Apple menu with control panel | System 7.5.3, system directory and info | System 7.5.3, file menu and system directory |
System 7.5.3, help with text balloons | System 7.5.3, find file | Mac OS 7.6.1, system is starting | Mac OS 7.6.1, desktop and system directory |
Mac OS 9, system is starting | Mac OS 9, desktop and version | Mac OS 9, iCab internet browser | Mac OS 9, Apple menu with system directory |
Mac OS 9, control panel | Mac OS 9, system partition | Mac OS 9, Sherlock 2 | Mac OS 9, context menu and alias |
Desktop of Mac OS 8.1 | Desktop of Mac OS 10 | Mac OS 10.3 - Boot logo | Mac OS 10.3 - Installation screen |
Language selection | Mac OS X installer | Storage drive for installation | Installation type for custom install |
Boot screen of Mac OS X | Desktop with user directory | About this mac | System Preferences |
Safari Internet Browser | Software Update | Applications | Unix bash terminal |
Internet Explorer 5.2 for Mac |
Versions
1985 - System 2.0, updates and improvements like the Finder and menu
1986 - System 3.0, contains optimizations, first time with HFS file system
1987 - System 4.0, bug fixes
1987 - System 4.1, improved Finder (supports HDD >32 mbyte)
1988 - System 6, 32-bit color, Quickdraw support, serial port driver support, Truetype fonts
1990 - System 7, 32-bit memory adressing on supported hardware, first time with virtual memory, updated GUI
1994 - System 7.5
1997 - Mac OS 7.6
1997 - Mac OS 8.0
1998 - Mac OS 8.1, 32-Bit, file system HFS+, only limited memory protection, USB and Firewire on supported hardware
1998 - Mac OS 8.5.1, Sherlock search files on hard disks and on the internet, intranet updates
1999 - Mac OS 8.6, multi-processor capable
1999 - Mac OS 9 (sonata), Sherlock 2 can handle files with size up to 2 tbyte, user profiles (multiple users)
2001 - Mac OS 9.1
1999 - Mac OS X Server, Mach- Kernel 2.5 (Unix-derivated microkernel) better performance and stability
1999 March - Mac OS X Server 1.0
2000 - Mac OS X Server 1.2.3
2001 March - Mac OS X 10.0 (Cheetah)
2001 Sept. - Mac OS X 10.1 (Puma), improved performance, improved GUI
2002 Aug. - Mac OS X 10.2 (Jaguar), new applications and technology
2003 Oct. - Mac OS X 10.3 (Panther), new features for improved productivity and security; Mac OS X Server 10.3
2005 April - Mac OS X 10.4 (Tiger), new technology; Mac OS X Server 10.4
2006 Jan. - Mac OS X 10.4.4, first also available vor intel based syystems
2007 Oct. - Mac OS X 10.5 (Leopard)
2009 Sept. - Mac OS X 10.6 (Snow Leopard), only for x86-64 Bit Intel dualcore
2016 Sept. - macOS 10.12 (Sierra) available, introducing Apple File System (APFS)