Apple Releases macOS Big Sur 11.6.7 With Mail App Fix - MacRumors
Skip to Content

Apple Releases macOS Big Sur 11.6.7 With Mail App Fix

Apple today released macOS Big Sur 11.6.7, a minor update to the macOS Big Sur operating system that preceded the current macOS Monterey release. The update is being made available to those with Macs that are still running the Big Sur operating system.

macOS Big Sur Feature Triad
The new ‌‌‌‌‌‌‌macOS Big Sur‌‌‌‌‌‌ 11.6.7 update can be downloaded to all eligible Macs using the Software Update section of System Preferences.

According to Apple's release notes, the update addresses an issue that could cause Mail and apps like Microsoft Outlook to be unable to open attachments if the app required to open the file is already running.

Related Forum: macOS Big Sur

Popular Stories

macOS 27 on MacBook Pro

macOS 27 Will Mark the End of an Era

Saturday April 18, 2026 6:45 am PDT by
During its Platforms State of the Union segment at WWDC 2025, Apple revealed that macOS 26 Tahoe is the final major macOS version for Intel-based Macs. The upcoming macOS 27 release will be compatible with Apple silicon Macs only, meaning that you will need a Mac with an M-series chip or a MacBook Neo with an A18 Pro chip in order to install the software update. macOS 27 should be available...
Aston Martin CarPlay Ultra Screen

Apple Says CarPlay Ultra is Coming to These Vehicle Brands

Saturday April 18, 2026 5:59 am PDT by
Last year, Apple launched CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles. Nearly a year later, CarPlay Ultra is still limited to Aston Martin's latest luxury vehicles, but that should change fairly soon. In May 2025, Apple said many other vehicle brands planned to offer CarPlay Ultra, including Hyundai, Kia, and Genesis. CarPlay Ultra...
Tim Cook Rainbow

Apple CEO Tim Cook Stepping Down, John Ternus Taking Over

Monday April 20, 2026 1:33 pm PDT by
Apple CEO Tim Cook is stepping down as Apple's chief executive officer, and hardware engineering chief John Ternus is set to take over, Apple announced today. Cook will continue on as Apple CEO through the summer, with Ternus set to join Apple's Board of Directors and take over as CEO on September 1, 2026. Cook is going to transition to executive chairman, and he will "assist with certain...

Top Rated Comments

GubbyMan Avatar
51 months ago
It's good to see Apple pushing updates for older versions now that I'll be stuck on Monterey (2016 MBP). I still think they should update Macs to the latest OS for more than 5 major OS versions but at least my MacBook will be supported for a few more years. Also Microsoft isn't doing any better... :rolleyes:
Score: 10 Votes (Like | Disagree)
Cognizant. Avatar
51 months ago

It's so weird how Apple's OS often breaks 3rd party software. I never hear about Microsoft's OS doing the same thing.
Microsoft released updates that have literally wiped people's entire hard drives.
Score: 8 Votes (Like | Disagree)
pdaholic Avatar
51 months ago
I've got a 2013 MacBook Pro, and I've been itching to get a new one, but this one is running smoothly and just won't die! Glad to have an update to Big Sur, the last OS supported by this nearly 10 year old Mac.
Score: 7 Votes (Like | Disagree)
51 months ago

LOL I hope that was being facetious.

Microsoft broke 120,000 desktop seats across 5000 separate companies due to a bug in IE9 download prompting. This was open for 9 years in Connect until they shut that down and they never even looked at it despite being a MS Gold Partner at the time. The bug went away when they replaced IE with Edge finally.
oh my Gosh. Internet Explorer version 9 was so long ago. I think Netscape was still around.

Give Microsoft a break. Will you?
Score: 6 Votes (Like | Disagree)
51 months ago

oh my Gosh. Internet Explorer version 9 was so long ago. I think Netscape was still around.

Give Microsoft a break. Will you?
Why should he? He responded to a post stating only Apple has these issues. Which is obviously nonsense.
Score: 5 Votes (Like | Disagree)
iHorseHead Avatar
51 months ago

It's good to see Apple pushing updates for older versions now that I'll be stuck on Monterey (2016 MBP). I still think they should update Macs to the latest OS for more than 5 major OS versions but at least my MacBook will be supported for a few more years. Also Microsoft isn't doing any better... :rolleyes:
I know how you feel. I had MacBook from early 2008 and it was as expensive as my M1 MacBook Air. It lost the support after 4 years. Leopard, Snow Leopard and Lion. I went to Apple Discussion's to complain and they just told me to buy a new Mac.

Also, Microsoft is doing a great job. Windows is always supported for longer than Mac. Your 2016 MBP could even run Windows 11.
Score: 4 Votes (Like | Disagree)