The Mac “OS X” system celebrates its 21st candle

Before becoming macOS, the Mac operating system was called OS X. Before that again, you had to rely on Mac OS to operate your Apple machine. If this is only a change of name for the same software, in essence, it is a question of much clearer and more significant developments.

The latest is therefore the transition from OS X to macOS, which took place in 2015 with the transition from Mac OS X El Capitan (10.11) to macOS Sierra (10.12).

Concerning Mac OS X precisely, this week is special, since it is March 25 that Apple was launching the first version of the OS so named. Precisely, on March 24, 2001, Mac OS X Cheetah was released for the general public. It was then version 10.0 of the operating system for Apple computers. And that was so ago 21 years oldone day ready.

In total, OS X has had 12 major iterations, here they are according to their release date:

  • Cheetah: March 2001
  • Puma: September 2001
  • Jaguar: August 2002
  • Panther: October 2003
  • Tiger: January 2006
  • Leopard: October 2007
  • Snow Leopard: August 2009
  • Leo: July 2011
  • Mountain Lion: July 2012
  • Mavericks: October 2013
  • Yosemite: October 2014
  • El Capitan: September 2015

21 years old, and what an evolution since Cheetah! One of the biggest changes in my opinion was the transition to 64 bits for applicationswhich started with Snow Leopard and its support for 32 and 64-bit applications, and ended with Mountain Lion, released in 2012. Since this version of the system, it is no longer possible to use 32-bit applications on Mac.

Note also the arrival of support for the ExFAT file system with Snow Leopard 10.6.5 in 2009, or that of Safari with Jaguar 10.2 in 2002.

Mac OS X Leopard

Mac OS X Leopard © Apple

To celebrate this anniversary of the 21 years of OS X, if you had the chance to know the evolution of this system from 2001 to 2015, tell us what was the novelty brought by an update that most impressed you marked at the time.

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