Apple has posted a version 1.1 firmware update for Power Mac G5 single-processor systems clocked at 1.8GHz. The update is available for download from Apple’s
Web page. Such systems were manufactured and purchased in late 2004.
Some of the Power Mac G5s that fit this description are prone to specific problems this firmware update attempts to address. These problems include freezing when performing some video-intensive tasks for extended periods; the optical drive may not eject if you’ve been using the computer for about two hours; Internet Connect can become unresponsive when you’ve been using the computer for about two hours; or attached displays may not wake up properly after the computer has been sleeping for an extended period of time (specifically for Mac OS X v10.4 “Tiger” users).
The v1.1 firmware update requires Mac OS X v10.4.3 or later.