Apple Mac OS X

The operating system on Apple computers started out being called Mac OS X, when in the year 2000 they switched to the 10th version. “Codenames” were then a collection of various “cats”, starting with Cheetah and ending at version 10.8 with “Mountain Lion”.
At version 10.8, the system changed its name to OS X, and from version 10.12 to macOS, thus dropping the “X”.

As something new in version 10.15 Catalina, it is pure 64 bit, which means that users who upgrade their machines may find that old programs no longer work. Especially e.g. Microsoft Office or various Adobe programs if they are the old 32 bit versions.
If you don’t want to downgrade to Mojave or earlier, you will have to buy new versions of Microsoft Office, Adobe, or other old programs that can no longer run.

Compatibility info regarding the 3 latest versions

MacOS Monterey, was released in autumn 2021. Read more about it here at Apple.
Compatible Mac devices:

  • iMac late 2015 and later
  • iMac Pro 2017 and later
  • MacBook Air early 2015 and later
  • MacBook Pro early 2015 and later
  • Mac Pro late 2013 and later
  • Mac mini late 2014 and later
  • MacBook early 2016 and later

Some of the new features in MacOS Monterey are only available in Macs with the new M1 chip.

MacOS Ventura kom i 2022, og kan køre på følgende enheder:

MacOS Sonoma from 2023, is compatible with the following devices:


List of Apple operating systems in version 10 / X.

Mac OS X 10.0, Cheetah
Mac OS X 10.1, Puma
Mac OS X 10.2, Jaguar
Mac OS X 10.3, Panther
Mac OS X 10.4, Tiger
Mac OS X 10.5, Leopard
Mac OS X 10.6, Snow Leopard
Mac OS X 10.7, Lion
OS X 10.8, Mountain Lion
OS X 10.9, Mavericks
OS X 10.10, Yosemite (upgrade og download info)
OS X 10.11, El Capitan (upgrade og download info)
macOS 10.12, Sierra (upgrade og download info)
macOS 10.13, High Sierra (upgrade og download info)
macOS 10.14, Mojave (upgrade og download info)
macOS 10.15, Catalina
MacOS 11, Big Sur
MacOS 12, Monterey (2021)
MacOS 13 , Ventura (2022)
MacOS 14, Sonoma (2023)


List of models and compatible Operating Systems.
Mac Pro
Mac mini
MacBook Air
MacBook Pro

Contact ComputerLab, if you need help with upgrading, or solving other IT problems.