Apple has released
Power Mac G5 Uniprocessor Firmware Update 5.1.5f2, a new release aimed at Power Mac G5s that have only a single processor. The update apparently corrects “unexpected issues” that have appeared on some Power Mac G5s after applying the
first uniprocessor update, released earlier this month.
Apple describes such “unexpected issues” as a possible “kernel panic, the loss of USB function with some keyboards or mouse tracking devices, Bluetooth USB modules that don’t respond five minutes after starting up, or interrupted audio playback in iTunes. Disconnecting and reconnecting devices does not help.” Apple has
posted some details
about the issue on their online support database.
Apple advises users whose single-processor Power Mac G5s display these symptoms to remove any third-party RAM from their Power Mac G5, run the new Firmware Updater, then reinstall their third-party RAM. More details are available on the Web page.