Along with Apple's OS X 10.8.2 update, the company has issued firmware updates for some of its latest MacBook Pro and MacBook Air models.
Apple's latest MacBook offerings are the 2012 MacBook Pro with Retina Display, and a 2012 revision of the older-generation MacBook Pro that does not have the Retina Display, along with the MacBook Air. Under some circumstances, these latest systems may experience hangs, or incompatibility with certain boot environments that prevent their hardware from running optimally, and these latest EFI firmware updates from Apple address these problems.
The updates should be available to relevant systems through Apple's Software Update service, but can also be downloaded from their respective Apple Support Downloads pages:
- MacBook Air EFI Firmware update 2.5
This update addresses a problem where the Turbo Boost feature of the Intel chips used in these systems may not work when using Windows in Boot Camp. In addition, it fixes a problems where NetBoot would not work when using an Ethernet adapter.
- MacBook Pro (non-Retina) EFI Firmware Update 2.9
This update fixes problems where under high CPU loads, the system may hang and require a forced restart to resume functionality.
- MacBook Pro Retina EFI Update v1.0 As with the non-Retina systems, this update fixes problems where the system may hang under heavy CPU loads, but similar to the MacBook Air it addresses the problem of NetBoot not working when using an Ethernet adapter.
As with any update, be sure to back up your system fully before applying, but with firmware updates be particularly careful and follow the onscreen instructions, as interruptions in firmware updates may result in a broken computer that will need extensive repair or replacement.