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
The update includes improvements for many USB and FireWire devices; this includes support for more digital cameras, as well as overall enhancements to CD and DVD burning.
Enhancements are also present, network-wise. AFP, SMB and WebDAV networking have been improved. Also, printing received improved support.
The Finder and Mail were updated as well, and better application support overall was delivered as well. For users of the PowerBook G4, hardware accelerated video mirroring has been enabled.