Apple Releases macOS Big Sur 11.2.1 With Fix for MacBook Pro Charging Issue [Updated]

Apple today released macOS Big Sur 11.2.1, the third update to the macOS Big Sur operating system that launched in November. macOS Big Sur‌ 11.2.1 comes a little over a week after the release of macOS 11.2.

First Look Big Sur Feature2
The new ‌‌‌macOS Big Sur‌‌ 11.2.1‌ update can be downloaded for free on all eligible Macs using the Software Update section of System Preferences.

According to Apple's release notes, macOS Big Sur 11.2.1 addresses an issue that could prevent the battery from charging in some 2016 and 2017 MacBook Pro models. In an Apple support document released alongside the update, Apple says that a small number of customers with 2016 and 2017 MacBook Pro models have experienced a bug that causes their batteries not to charge past 1 percent, an issue macOS Big Sur 11.2.1 fixes.

Affected customers who ran into the problem with an earlier version of macOS Big Sur will also see a "Service Recommended" notice and will need to contact Apple for a free battery replacement.

Update: macOS 11.2.1 also fixes a significant security vulnerability.

Top Rated Comments

Stuipdboy1000 Avatar
20 months ago
https://support.apple.com/en-gb/HT212177

Contains security fixes too, including the Sudo bug.
Score: 17 Votes (Like | Disagree)
zorinlynx Avatar
20 months ago

Apple should really rework the update process.

2.5 GB Download for each of my Macs und installing the update takes forever... That is one of the things Linux is much better at.
If you're concerned about data usage, turn on content caching on one of your Macs. This is located in System Preferences -> Sharing, at the bottom of the list. Preferably do this on your Mac that has the most disk space, a desktop like an iMac or Mac Mini that is on most of the time. Adjust the slider to the amount of disk space you feel comfortable using for this. I have mine at 50GB which is enough for most things.

Then only the first Mac has to download the update. The remaining machines will grab the update from the Content Caching Mac. Devices will find the content caching Mac automatically; you don't have to do anything but make sure it's turned on before you update the first machine.

This will cache pretty much everything, too. iOS updates, and also iCloud content. Like, if you take a photo on your iPhone and it uploads to iCloud, the Caching machine will cache that and when iCloud Photos syncs on your other devices it pulls from the cache. It's a pretty sweet feature.
Score: 12 Votes (Like | Disagree)
andycyphert Avatar
20 months ago
They’re going to need a lot more than that to fix Bug Sur....
Score: 11 Votes (Like | Disagree)
Soba Avatar
20 months ago

weird bug affecting specific machines

Gonna hold off since not impacted

edit: fixes sudo bug, I stand corrected.
This is one of the things that really annoys me about Apple's patches: The release notes are virtually nonexistent.

I get that there are certain fixes Apple might not want to call attention to, but their software updates for most of the last 10 years have come with only the barest release notes. This Big Sur release fixes the sudo bug, and judging from other posts, it also tweaked drivers, Bluetooth, and other things.

This really should be presented to the user in the UI; telling the user that a specific problem is fixed while not mentioning fixes for other known problems leads the user to think (quite reasonably) that nothing was fixed except for what was explicitly mentioned.

Apple used to publish very detailed release notes for most of their OS updates. I write technical docs for a living these days, so I'd love to see that kind of attention to detail from them, again.
Score: 7 Votes (Like | Disagree)
robotica Avatar
20 months ago
2.43GB on my 2018 MM seems large for such a specific fix.
Score: 7 Votes (Like | Disagree)
zorinlynx Avatar
20 months ago
List of updated files on the system partition:

https://zorin.org/share/update-changed.txt

sudo, the mentioned battery/power stuff, Bluetooth, Intel graphics drivers (as mentioned), HID drivers, and a few other random odds and ends.

I'm surprised to see so many changes to Bluetooth-related files; maybe they're still working on fixing those issues.
Score: 7 Votes (Like | Disagree)

Related Stories

macOS Big Sur Feature Blue

Apple Seeds Fourth Beta of macOS Big Sur 11.5 to Developers

Tuesday June 29, 2021 10:14 am PDT by
Apple today seeded the fourth beta of an upcoming macOS Big Sur 11.5 update to developers for testing purposes, with the new beta coming two weeks after the release of the third macOS Big Sur 11.5 beta. Developers can download the ‌‌‌‌macOS Big Sur‌‌‌‌ 11.5 beta using the Software Update mechanism in System Preferences after installing the proper profile from the Apple...
macOS Big Sur Feature Blue

Apple Seeds Seventh Beta of macOS Big Sur 11.3 to Developers

Thursday April 8, 2021 10:07 am PDT by
Apple today seeded the seventh beta of an upcoming macOS Big Sur 11.3 update to developers for testing purposes, with the new beta coming one week after the launch of the sixth beta and more than a month after the release of macOS Big Sur 11.2, a bug fix update. Developers can download the ‌‌macOS Big Sur‌‌ 11.3 beta using the Software Update mechanism in System Preferences after...
macOS Big Sur Feature Blue

Apple Seeds Second Release Candidate Version of macOS Big Sur 11.5 to Developers

Monday July 19, 2021 10:40 am PDT by
Apple today seeded a second release candidate version of an upcoming macOS Big Sur 11.5 update to developers for testing purposes, with the new update coming one week after the release of the first RC version. Developers can download the ‌‌‌‌macOS Big Sur‌‌‌‌ 11.5 beta using the Software Update mechanism in System Preferences after installing the proper profile from the Apple ...
macOS Big Sur Feature Triad

Apple Releases macOS Big Sur 11.6 With Security Fixes

Monday September 13, 2021 10:20 am PDT by
Apple today released macOS Big Sur 11.6, the sixth major update to the macOS Big Sur operating system that first launched in November 2020. macOS Big Sur 11.6 comes a month after the release of macOS Big Sur 11.5.2, a bug fix update. The new ‌‌‌‌‌‌macOS Big Sur‌‌‌‌‌ 11.6 update can be downloaded all eligible Macs using the Software Update section of System Preferences. ...
macOS Big Sur Feature Orange

Apple Releases macOS Big Sur 11.5.2 With Bug Fixes

Wednesday August 11, 2021 10:17 am PDT by
Apple has released a new macOS Big Sur 11.5.2 update, delivering unspecified bug fixes for Mac users running the latest major operating system version. The update comes a little over two weeks after Apple released macOS 11.5.1. The new ‌‌‌‌‌‌‌macOS Big Sur‌‌‌‌‌‌ 11.5.2 update can be downloaded for free on all eligible Macs using the Software Update section of System ...
macOS Big Sur Feature Blue

Apple Seeds Release Candidate Version of macOS Big Sur 11.5 to Developers

Tuesday July 13, 2021 10:19 am PDT by
Apple today seeded the release candidate version of an upcoming macOS Big Sur 11.5 update to developers for testing purposes, with the new beta coming one week after the release of the fifth macOS Big Sur 11.5 beta. Developers can download the ‌‌‌‌macOS Big Sur‌‌‌‌ 11.5 beta using the Software Update mechanism in System Preferences after installing the proper profile from the ...
macOS Big Sur Feature Triad

Apple Seeds Third Beta of macOS Big Sur 11.4 to Developers

Monday May 10, 2021 10:14 am PDT by
Apple today seeded the third beta of an upcoming macOS Big Sur 11.4 update to developers for testing purposes, with the new beta coming two weeks after the release of the second macOS Big Sur 11.4 beta. Developers can download the ‌‌‌macOS Big Sur‌‌‌ 11.4 beta using the Software Update mechanism in System Preferences after installing the proper profile from the Apple Developer...
macOS Big Sur Feature Blue

Apple Seeds Third Beta of macOS Big Sur 11.5 to Developers

Monday June 14, 2021 10:04 am PDT by
Apple today seeded the third beta of an upcoming macOS Big Sur 11.5 update to developers for testing purposes, with the new beta coming two weeks after the release of the second macOS Big Sur 11.5 beta. Developers can download the ‌‌‌‌macOS Big Sur‌‌‌‌ 11.5 beta using the Software Update mechanism in System Preferences after installing the proper profile from the Apple...

Popular Stories

Apple Watch Series 7 Starlight Midnight

Standard Apple Watch Series 8 Rumored to Feature Same Design as Series 7

Friday August 5, 2022 7:46 am PDT by
The standard 41mm and 45mm models of the Apple Watch Series 8 will feature the same design as the Apple Watch Series 7, according to Twitter user @ShrimpApplePro, who was first to reveal that iPhone 14 Pro models would feature a new pill-and-hole display. Titanium will not be an option for the standard Apple Watch Series 8 models either, according to @ShrimpApplePro, but Bloomberg's Mark...
iPhone 14 Pro Purple Front and Back MacRumors Exclusive

Five iPhone 14 Rumors You May Have Missed

Thursday August 4, 2022 6:05 am PDT by
With August upon us, the countdown is officially on. We're just weeks away from when we're expecting Apple to announce the iPhone 14 lineup. Rumors of the next iPhone start early in the year, and as a result, some details about the upcoming device sometimes get lost in the crowd. Exclusive MacRumors iPhone 14 Pro renders by graphic designer Ian Zelbo To help MacRumors readers, we've created a ...
oneplus 10t and iphone 13 pro

Camera Comparison: The New OnePlus 10T vs. iPhone 13 Pro Max

Wednesday August 3, 2022 8:30 am PDT by
Android-based smartphone company OnePlus today announced the launch of its newest device, the OnePlus 10T, which we were able to check out ahead of time. The OnePlus 10T, priced starting at $649, boasts upgraded camera technology, so we thought we'd pit it against the iPhone 13 Pro Max to see just how it measures up. Subscribe to the MacRumors YouTube channel for more videos. The OnePlus 10T...
banish safari app pop ups

New iOS App Blocks Those Annoying 'Open in App' Pop-Ups in Safari

Friday August 5, 2022 2:47 am PDT by
You've probably experienced visiting a website like Reddit or LinkedIn on your iPhone only to be greeted with an annoying, almost full-screen pop-up urging you to view the content in their app instead of on the website. It's a common practice for websites that have accompanying iOS apps to push users to open (if they already have the app installed) or download their app from the App Store to ...
apple watch series 7 titanium

Apple Watch Edition Begins Selling Out Ahead of Series 8 Launch

Tuesday August 2, 2022 7:55 am PDT by
Apple Watch Edition models are beginning to sell out just weeks before the Apple Watch Series 8 lineup is expected to be announced. Several of the high-end Apple Watch Series 7 models with titanium casings are listed as "currently unavailable" on Apple's online store in the United States, Canada, the United Kingdom, and select other countries. In the United States, availability of 41mm...