Apple has released December's security update, improving its operating system's Apache, AppKit, HIToolbox, Kerberos, Postfix, PSNormalizer, Safari and Terminal components.

The 12.7MB download is available through Software Update and can also be downloaded from Apple's tech support Web site.

The company has released detailed information revealing which vulnerabilities have been fixed.

Separate downloads are available for Mac OS X 10.2.8 client and server, and Mac OS X 10.3.6 client and server.