macOS, previously known
as Mac
OS X and
OS X, is the
operating system for Apple'
s desktop and
laptop computers. Here'
s an overview of its version
history: ### Mac
OS X (2001-2012)
1. **Mac
OS X 10.
0 (Cheetah)** - March 24, 2001
2. **Mac
OS X 10.
1 (Puma)** - September 25, 2001
3. **Mac
OS X 10.
