The OS X Tiger 10.4.5 update comes after Russian hacker "Maxxuss" claimed that version 10.4.4 for Intel possessors had been cracked.
Addressed in 10.4.5 are fixes to its Safari Web browser that had caused it to suddenly crash on AOL webmail users when they were deleting AOL mail messages.
Fixes for Intel-based Macs are also addressed in the update.
Another fix resolves an issue relating to key chain notification on Intel-based Macs running applications via Rosetta.
The new fixes comes as the first Intel-based Apple notebooks are now hitting. Desktops based on the Intel architecture have been shipping since January.
The 10.4.5 release is the fifth major update to OS X Tiger since it was released in April 2005.