Apple has released Mac OS X 10.1.5. The update is available for download using OS X’s Software Update feature.

The 22.4MB download offers a selection of enhancements for the OS, including beefed-up networking, security, reliability, and support for PC Card serial-communication devices.

Additional features are listed in a document downloaded with the update. There is improved support for peripherals, including Canon and Nikon digital cameras; expanded support for disc-recording devices from many manufacturers; and improved Magneto-optical drive support.

Apple’s bundled applications also come in for improvement – both Mail and Sherlock are made more stable by the release. QuickTime and 2D hardware-acceleration support for the Rage Pro GPU appears. Updated Carbon applications can also use Apple’s recently announced Quartz anti-aliasing technology for high-quality text display.

Users’ iDisks now mount more efficiently, and support has been added to connect iDisk using AirPort’s default DNS settings. The update also supports the mounting of a WebDAV volume from a non-standard http port.

Asian language support has also been enhanced in this release of the OS.