Apple Launches New EFI Update 2.9.1 For 2011 MacBook Air to Solve Installation Problems - MacRumors
Skip to Content

Apple Launches New EFI Update 2.9.1 For 2011 MacBook Air to Solve Installation Problems

by

Apple today re-released its EFI Firmware 2.9 update for 2011 MacBook Air models after the original EFI update appeared to be causing trouble for many MacBook Air users.

The update, originally released on July 15 to address sleep/wake issues, caused some MacBook Air machines to shut down completely for several hours. On other machines, the update simply refused to install. Today's re-released software, labeled 2.9.1, presumably fixes these issues, allowing the update to be properly installed.

efiupdate29
The MacBook Air EFI Firmware Update 2.9.1 is available in the Mac App Store for 2011 MacBook Airs and can also be downloaded from the Apple Support site.

Top Rated Comments

154 months ago
So weird, even though updates generally mean bugs, I'm always jealous when there isn't an update to my specific piece of hardware. :D
Score: 5 Votes (Like | Disagree)
154 months ago
It's almost like they are trying to force people to upgrade by deliberately slowing older machines down ;)
I agree. I think middle-upper management has a hand in either deliberately doing this - or they just don't care when they accidentally break older machines a bit and don't put very much effort into fixing to try to encourage upgrading.

That being said, this EFI update seems to have fixed my fan from screaming like a jet engine all the time, and has also sped up waking from sleep considerably so I'll throw a "thank you" out to the engineer at Apple who managed to fix this - while having to deal with his pointy haired boss who was hindering his every step.



If they really want me to upgrade, they need to throw me a bone. A specific bone: rMBA. Nothing else will satisfy.
Score: 1 Votes (Like | Disagree)
154 months ago
Updated on my 13" i7

Works like a charm, like it always did.

Maybe it is because I had a crappy PC for so many years, but this computer is blazingly fast since day 1, 3 years ago.

Heck, the OS will eat RAM as much as it can, and that's ok because swap is always minimal (thank you mavericks!), and I feel no difference in performance when all RAM is being used.

Great machine. Best laptop ever, indeed. I believe that it will take me more 5 years to update to a new MBAir, but Apple clearly gained my trust and admiration because of this computer.
Score: 1 Votes (Like | Disagree)
154 months ago
nzalog, your signature isn't completely accurate.

Your face is inaccurate! :eek: ;) :D

You are one of the first to actually notice that. :)
Score: 1 Votes (Like | Disagree)

Popular Stories

iOS 26

iOS 26.5 Features: Everything New in iOS 26.5

Monday May 11, 2026 5:09 pm PDT by
Apple released iOS 26.5 after a few months of beta testing, and while it doesn't have the Siri features we were hoping for since those are being held until iOS 27, there are a handful of useful changes worth knowing about. Subscribe to the MacRumors YouTube channel for more videos. End-to-End Encryption for RCS Support for end-to-end encryption (E2EE) for RCS messages between iPhone and...
Dynamic Island iPhone 18 Pro Feature

11 Reasons to Wait for the iPhone 18 Pro

Monday May 11, 2026 9:01 am PDT by
We're only four months out from the launch of Apple's premium next-generation smartphone lineup, and while we're not expecting a sea change in terms of functionality, there are still several enhancements rumored to be coming to the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth noting is that Apple is reportedly planning a major change to its iPhone release cycle this year, adopting a...
Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro May Have 'Aggressive' Starting Price Despite RAM Crisis

Tuesday May 12, 2026 6:53 am PDT by
While the ongoing RAM chip shortage is leading some Android smartphone makers to increase prices, one analyst believes that Apple will take advantage of the situation with the upcoming iPhone 18 Pro and iPhone 18 Pro Max. In a research note with GF Securities today, analyst Jeff Pu said he expects Apple to outperform in the smartphone market by having an "aggressive pricing strategy" for the ...