Mac OS X 10.1

Mac OS X 10.1 (code named Puma) is the second major release of macOS, Apple's desktop and server operating system. It superseded Mac OS X 10.0 and preceded Mac OS X Jaguar. Mac OS X 10.1 was released on September 25, 2001, as a free update for Mac OS X 10.0 users. The operating system was handed out for free by Apple employees after Steve Jobs' keynote speech at the Seybold publishing conference in San Francisco. It was subsequently distributed to Mac users on October 25, 2001, at Apple Stores and other retail stores that carried Apple products.

Mac OS X 10.1 box art

Developed by: Apple Computer, Inc.

General availability: September 25, 2001 (version 10.1 build 5G64)

Last release: June 5, 2002 (version 10.1.5 build 5S60)

Preceded by: Mac OS X 10.0 (codename Cheetah)

Succeeded by: Mac OS X Jaguar

Kernel type: Hybrid (XNU)

Support status: Historical, unsupported as of November 13, 2006

Mac OS X 10.1 was codenamed "Puma" because the internal team thought it was "one fast cat."

System requirements Supported computers: RAM: Hard Drive Space:
Features

Apple introduced many features that were missing from the previous version, as well as improving overall system performance.

This system release brought some major new features to the Mac OS X platform:

Release History
Version Build Date Darwin Version
10.1 5G64 September 25, 2001 1.4.1
10.1.1 5M28 November 12, 2001 5.1
10.1.2 5P48 Decmber 21, 2001 5.2
10.1.3 5Q45 May 9, 2001 5.3
10.1.4 5Q125 April 17, 2002 5.4
10.1.5 5S60 June 5, 2002 5.5
User Interface
Mac OS X 10.1 screenshot
A screenshot of Mac OS X 10.1 displaying Finder and System Preferences