Apple releases firmware update for mid-2012 MacBook Air

9 January, 2013 - Paul Dixon
MacBook Air

Apple has today released a firmware update for all mid-2012 MacBook Air models. The update addresses a number of issues that users may be experiencing with their machines, including one related to how colour is displayed on external HDMI monitors.

Release notes:

About MacBook Air EFI Firmware Update 2.6
This update is recommended for MacBook Air (mid 2012) models.

This update fixes a color issue with HDMI displays connected to MacBook Air, resolves an issue with Windows which can prevent MacBook Air from booting properly, and also resolves an issue where unplugging a Thunderbolt device may cause the system to freeze when waking from standby.

The MacBook Air EFI Firmware Update will update the EFI firmware on your computer.

Your computer’s power cord must be connected and plugged into a working power source. When your MacBook Air restarts, a gray screen will appear with a status bar to indicate the progress of the update. It will take several minutes for the update to complete. Do not disturb or shut off the power on your MacBook Air during this update.

After update EFI ROM will be: MBA51.00EF.B02

The firmware update should appear in the Mac App Store on affected machines, but it can also be downloaded from Apple’s Support site.

About the author

Paul Dixon is the owner of Macsessed. He lives in Lancashire in the UK where he works as a web designer. You can find him on and Twitter.