Apple on Thursday evening released an EFI Firmware update for the latest iteration of its MacBook Pro notebooks and also issued a new version of its Firmware Restoration CD for use with all Intel-based Macs.
The EFI partition is used when the firmware is updated. I assume this EFI partition must be on the primary internal disk. Apple posted that firmware updates require a GUID partition scheme at the archived website Firmware updates for Intel-based Macs require a GUID partition scheme, although the site does not explicitly say this must be the primary drive. Professional EFI Systems Inc. Products are designed and sold for sanctioned off-road/competition non-emissions controlled vehicles only and may never be used on a public road or highway. Using Professional EFI Systems Inc. Products for street/road use on public roads or highways is prohibited by law unless a specific regulatory exemption exists. Review and download the firmware from here: About EFI and SMC firmware updates for Intel-based Mac computers. That should do it. Update : OK now I see what you did you forced the MacBook system to use a MacBook Pro firmware instead of what it was designed to run with here. MacBook Unibody Model A1342.
MacBook Pro EFI Firmware Update 1.3 [1.8MB] fixes a display issue on 2.2/2.4GHz 15-inch MacBook Pro models, which were released last month.
Apple said the update requires MacBook Pro Software Update 1.0, but otherwise provided no further information on the release.
Firmware Restoration CD 1.3 [22.5MB] can be used to restore the firmware of an Intel-based Macintosh computer. However, Apple says the CD can only be used to restore the firmware after an interrupted or failed update.
Macbook Pro Efi Firmware Downloads
'If your computer is already in this state, you’ll need to download the software and create the CD on another Macintosh computer, or you can take your computer to an Apple Store or Apple Authorized Service Provider to restore your firmware,' the company advises. 'This CD can be created on both PowerPC- and Intel-based Macintosh computers.'
Macbook Pro Efi Boot
Firmware Restoration CD 1.3 cannot be used to return an Intel-based Macintosh computer’s firmware to a previous version if a successful update has already been performed.
Those users who feel they may need to run the Firmware Restoration software can find detailed instructions on how to create and run a Restoration CD from Apple's support site.
Macbook Pro Efi Update
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