Apple Inc., today released a firmware upgrade that it said fixes an issue with the drive interface in new MacBook Pros. The update comes shortly after several users discovered that the new MacBook Pros were limited to a top speed of 1.5Gbps, even though the hardware is capable of as much as a 3Gbps theoretical maximum.
Apple says the firmware update will allow higher transfer rates above the 1.5Gbps limit with SATA II-capable hard drives, but it also warns that doing so is officially unsupported. “All previous and current Apple portables with a SATA drive interface include a SATA 1.5Gbps hard drive,” according to Apple, though previous MacBook Pros reported that it used the higher SATA II limit.
Owners of MacBook Pros that shipped with solid-state drives (SSD), meanwhile, reported that they had the 3Gbps interface, leading many to scratch their heads at the inconsistency.
MacBook Pro EFI Firmware Update 1.7 addresses an issue using drives based on the SATA 3Gbps specification with the MacBook Pro introduced in June 2009. This update allows drives to use transfer rates greater than 1.5Gbps.
Apple also issued an iMac EFI Firmware 1.4 Update addresses issues where iMac computers with ATI Radeon HD 4850 graphics intermittently stop responding and addresses wake-from-sleep issues in Boot Camp.s a 1.7MB download that requires Mac OS X 10.5.6 or later.
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