Apple releases MacBook Pro EFI Firmware Update 1.5.1

Apple today released MacBook Pro EFI Firmware Update 1.5.1 which fixes several issues to improve the stability of MacBook Pro computers.

After the firmware is successfully applied to your Mac, your Boot ROM Version will be:
 MBP21.00A5.B08 or MBP31.0070.B07

You can confirm the version of the Boot ROM installed on your computer using System Profiler.

To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/MacBook Pro EFI Firmware The updater will launch automatically when the Installer closes.

System Requirements:
• Mac OS X 10.4.11 or later
• Mac OS X 10.5.2 or later

MacBook Pro EFI Firmware Update 1.5.1 is available via Software Update and also as a standalone installer.

More info and download link (4.9MB) here.

[Thanks to MacDailyNews Reader “Brawndo Drinker” for the heads up.]


  1. @willie g

    That may be just a result of (1) a lot more Macs being sold and used, which means that there will be more bug reports getting back to Apple which are then fixed and (2) more resources at Apple to fix things that in the past they may have just ignored.

    Of course it could be (3) sloppier coding to begin with that needs to be fixed.

    I will be an optimist and go with the first two options.

  2. Doesn’t appear to work for Mid-07 MBPs — gives me a “you don’t need this” message when downloading / installing from Apple AND it won’t appear in Software Updates list.

    So, if anyone has successfully applied this update, please advise on:
    – how
    – which MBP you have


Reader Feedback

This site uses Akismet to reduce spam. Learn how your comment data is processed.