Released on November 13, 2001, on the same day that AirPort Software 2.0 was made available for download, Mac OS X version 10.1.1 was the first update to Mac OS X 10.1 "Puma". The build number was 5M28, although this was 5M45 for PowerBooks that shipped with the new OS.
What's New in Mac OS X 10.1.1
Sources and References
- Mac OS X Update 10.1.1: Information and Download
- Build number information accessed on January 22, 2005 at The Apple Museum
- Release improvements from Apple's Software Update utility