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

157 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)
156 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)
156 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)
157 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

iPhone 18 Pro Deep Red Feature

iPhone 18 Pro Launching in Two Months With These 12 New Features

Friday July 24, 2026 7:26 pm PDT by
It is now late July, and that means the iPhone 18 Pro and iPhone 18 Pro Max are less than two months away. The devices are expected to look similar to the iPhone 17 Pro and iPhone 17 Pro Max, but there will still be many year-over-year changes, with rumored features including a smaller Dynamic Island, 5G via satellite, and more. Apple is expected to unveil the iPhone 18 Pro, iPhone 18 Pro...
macbook ultra

'MacBook Ultra' Coming Soon With These 12 New Features

Friday July 24, 2026 6:00 pm PDT by
Apple's first high-end MacBook redesign in five years is expected to arrive in the near future, bringing a run of firsts to the Mac. Bloomberg's Mark Gurman expects the laptop to arrive between late 2026 and early 2027, with the later window now looking more likely owing to the global memory chip shortage. Analyst Ming-Chi Kuo expects mass production to begin by late 2026. Apple last...
5 Reasons to Buy the iPhone 17 Now Feature

5 Reasons to Buy the iPhone 17 Now Instead of Waiting for iPhone 18

Thursday July 23, 2026 8:26 am PDT by
Apple's iPhone 18 Pro models and its first foldable are less than two months from being unveiled. That may sound like a reason to sit tight if you're looking to upgrade from an iPhone 16 or older series, but between looming price hikes and Apple's new split-launch calendar, there's a decent case for grabbing an iPhone 17 series model right now. Here are five reasons in favor of putting your order ...