The macOS Monterey 12.2 update was released on January 26, and some users are already reporting issues, with reports that Bluetooth accessories connected to the device are seemingly causing it to wake from sleep mode, draining battery life that would have otherwise been preserved.
As reported by MacRumors (opens in new tab), it's unclear how widespread the issue currently is, but there have been several posts across social media sites like Twitter and Reddit during the last few days that would indicate this isn't an isolated incident.
Here's what the #macOS #Monterey 12.2 #bluetooth sleep/wake battery-murdering glitch looks like, personified by my keyboard's capslock light. off=sleep, on=darkwake. Leave ur laptop unplugged & sleeping overnight, 👋🏼buh-bye to its battery! #goodtimes pic.twitter.com/O45y7MYLtlJanuary 31, 2022
While no official statement has been made from Apple, those affected have claimed that their Mac's battery life drops from 100% to 0% while left in sleep mode overnight, something that wasn't occurring prior to updating to macOS 12.2.
After some investigation, users like @Jpavao (opens in new tab) found that Bluetooth accessories are apparently causing the Macs to repeatedly wake from sleep mode, which drains the battery over the course of several hours. All fingers point to the latest update being responsible as both older Intel-based Macs and newer M1-powered devices appear to be affected.
Disabling the Bluetooth on the device or disconnecting all accessories connected via Bluetooth prior to placing the Mac into sleep mode seems to work as a quick fix, though this obviously isn't ideal if you have to set up your mouse, keyboard and headset every morning, especially if you use the MacBook for work.
Apple also made the beta version of Monterey 12.3 available to developers last week, though no mentions were made that refer to a fix within the notes, so it's unclear if the issue will be resolved when this update is pushed live for all macOS users or if another solution is in the works. We've reached out to Apple for clarification.
Analysis: keep calm and carry on
It's understandable that you might feel wary regarding upgrades when you see stories like this circulating, but we would always recommend that you keep your device up to date with the latest patches to help with security and app compatibility. Any problems that arise after an update, regardless of a system being Windows or macOS, are usually swiftly corrected.
It's important to remember though, that updates are likely never going to be a universal 'fix-all' for every user. In fact, the patch to fix this Bluetooth issue could just as likely cause problems for a handful of users who were not previously experiencing any. The risks of using an outdated operating system also far outweigh the risks that come with updating to the latest version though, so it isn't worth avoiding the upgrade to Monterey 12.2 if you've been putting it off.
It's not unusual for software updates and patches to cause additional issues that require additional work down the line. It's certainly a nuisance for those affected by the problem, but there are several workarounds that will help tide things over, such as leaving your MacBook charging overnight or disconnecting any Bluetooth accessories, until Apple can officially patch out the battery drain.
Make sure you check out our macOS Monterey problems guide for more advice on fixing issues with Apple's latest operating system.
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