iMac Firmware Update 1.4
Apple today released an iMac Firmware Update 1.4 to resolve some outstanding issues with certain models freezing and another issue with Bootcamp, Apple's technology for allowing users to run Windows on Mac. According to Apple's documentation, the update fixes intermittent system freeze issues for iMac computers with ATI Radeon HD 4850 graphics and fixes wake-from-sleep issues in Boot Camp. Readers report that the iMac freezes occur in a wide variety of applications--and even when not running Mac OS X (such as Bootcamp) and that typical troubleshooting steps do not resolve the issue.
Jobs promises iPhone fix
In response to one user's concerns – and potentially thousands of others' by proxy – Apple CEO Steve Jobs has personally, but briefly, addressed that the various iPhone app freezes would be resolved through a software update in September. For the past several weeks, users have been experiencing issues with third-party applications freezing the system, failing to start, or even halting the device's boot process, prompting a sometimes lengthy restore through iTunes, according to AppleInsider.
Mac Pro ATI freezing issue
Users in Apple's forums are expressing discontent with their Mac Pros, new and old, saying that the machines are suffering from graphics freezes that seem to revolve around ATI-based video cards. Reminiscent of freezes that happened on the aluminum iMacs, the freezes sometimes display graphical distortions, such as lines or swimming dots. Some users theorize that the Radeon X1900 and the 2600 XT tend to overheat easily, especially if the card is dusty.
Mac OS X 10.5.2 and the accompanying graphics update were released to alleviate both minor and substantial issues, but may have instigated a few issued of its own. According to users in Apple's Discussion forums [1|2|3|4], the update has created some printing problems, compatibility issues with third-party wireless routers, sound-related glitches, software freezing, and failures when using Time Machine to back up data.