The Mac operating system 'Mac OS X 10.4' bears the name 'Tiger'. The current version is 10.3.9 from April 15, 2005. Here, too, there were innovations - for Finder, zip files, doc compatibility of TextEdit, Xcode and more. From this version on, the big cat name was sometimes placed in front of the version number, so that Mac OS X Panther 10.3 is also a correct name. The Mac operating system 'Mac OS X 10.3' is called 'Panther'. And something was actually paired (haha), because this OS emerged from the combination of Mac OS 9 and the OPENSTEP or Rhapsody system from the Steve Jobs company NeXT, which was merged with Apple in 1996.

The Mac operating system 'Mac OS X 10.0' is called 'Cheetah', which means cheetah. After Mac OS 9.2.2, the “Mac OS X” versions continued, which I will now go into in more detail. This is a brief outline of the history of the Mac operating systems. From version 7.6, the operating system for Apple computers was again called Mac OS - up to version 9.2.2, which was pre-installed as the standard system on new Macs until January 2002. This was retained until the 1990s, up to version System 7.5.5. With version 4.0 in 1987 the name 'Macintosh System Software' came up, which was mostly abbreviated to 'System'. The name 'Mac OS' was already in use from System 0.97 in the early 1980s. Sir Apfelot recommendation: Clean up your Mac hard drive with CleanMyMac Earlier: Macintosh System Software So you can quickly find out when which OS was released for this or that Mac, iMac, Mac mini or MacBook ) You can find an overview of the individual Mac operating systems with name and version number here - from Mac OS X 10.0 Cheetah to OS X 10.8 Mountain Lion and macOS 10.12 Sierra to macOS 10.15 Catalina and macOS 11.0 Big Sur. Because in the following I have listed the past and current systems of the previous Apple computers and garnished with some background information. In order to keep an overview of the Mac operating systems with names and version numbers, you need a good memory - or just this blog post with the appropriate list.

The Apple Mac has seen many operating systems from Macintosh system software to Mac OS and OS X to macOS.

1 Very early: Macintosh system software.

Current mac operating system