macOS Monterey 12.3 Beta 2 Appears to Fix Bluetooth-Related Battery Drain Issue During Sleep Mode

Following the release of macOS Monterey 12.2 last month, some Mac users who installed the software update started to experience excessive battery drain during sleep mode, seemingly due to Bluetooth accessories frequently waking up the machines. The issue appears to affect Macs running the first beta of macOS 12.3 as well.

macOS Monterey on MBP Feature
Many affected users found their Mac's battery life dropped from 100% to 0% while in sleep mode overnight. A few users tried to identify a cause in Terminal and found that Bluetooth accessories were frequently causing a "DarkWake from Deep Idle" that resulted in the Mac repeatedly waking from sleep and draining the battery's charge.

Fortunately, it appears that the second beta of macOS 12.3 seeded today may resolve the issue. In a tweet, Mr. Macintosh said his 2018 MacBook Pro that was experiencing the issue on the first beta of macOS 12.3 is no longer affected on the second beta.


macOS 12.3 will likely be publicly released around March or April, providing a fix for all affected users. In the meantime, users can disable Bluetooth on their Mac or disconnect all Bluetooth accessories overnight to prevent battery drain.

Related Forum: macOS Monterey

Popular Stories

iphone 17 models

No iPhone 18 Launch This Year, Reports Suggest

Thursday January 1, 2026 8:43 am PST by
Apple is not expected to release a standard iPhone 18 model this year, according to a growing number of reports that suggest the company is planning a significant change to its long-standing annual iPhone launch cycle. Despite the immense success of the iPhone 17 in 2025, the iPhone 18 is not expected to arrive until the spring of 2027, leaving the iPhone 17 in the lineup as the latest...
duolingo ad live activity

Duolingo Used iPhone's Dynamic Island to Display Ads, Violating Apple Design Guidelines

Friday January 2, 2026 1:36 pm PST by
Language learning app Duolingo has apparently been using the iPhone's Live Activity feature to display ads on the Lock Screen and the Dynamic Island, which violates Apple's design guidelines. According to multiple reports on Reddit, the Duolingo app has been displaying an ad for a "Super offer," which is Duolingo's paid subscription option. Apple's guidelines for Live Activity state that...
Clicks Communicator Feature

'Clicks Communicator' Unveiled — Will You Carry This With Your iPhone?

Friday January 2, 2026 6:35 am PST by
The company behind the BlackBerry-like Clicks Keyboard accessory for the iPhone today unveiled a new Android 16 smartphone called the Clicks Communicator. The purpose-built device is designed to be used as a second phone alongside your iPhone, with the intended focus being communication over content consumption. It runs a custom Android launcher that offers a curated selection of messaging...
Low Cost MacBook Feature A18 Pro

Low-Price 12.9-Inch MacBook With A18 Pro Chip Reportedly Launching Early This Year

Friday January 2, 2026 9:08 am PST by
Apple plans to introduce a 12.9-inch MacBook in spring 2026, according to TrendForce. In a press release this week, the Taiwanese research firm said this MacBook will be aimed at the entry-level to mid-range market, with "competitive pricing." TrendForce did not share any further details about this MacBook, but the information that it shared lines up with several rumors about a more...
Apple Fitness Plus hero

Apple Announces New Fitness+ Workout Programs, Strava Challenge, and More

Friday January 2, 2026 6:43 am PST by
Apple today announced a number of updates to Apple Fitness+ and activity with the Apple Watch. The key announcements include: New Year limited-edition award: Users can win the award by closing all three Activity Rings for seven days in a row in January. "Quit Quitting" Strava challenge: Available in Strava throughout January, users who log 12 workouts anytime in the month will win an ...
Low Cost A18 Pro MacBook Feature Pink

Apple's 2026 Low-Cost A18 Pro MacBook: What We Know So Far

Friday January 2, 2026 4:33 pm PST by
Apple is planning to release a low-cost MacBook in 2026, which will apparently compete with more affordable Chromebooks and Windows PCs. Apple's most affordable Mac right now is the $999 MacBook Air, and the upcoming low-cost MacBook is expected to be cheaper. Here's what we know about the low-cost MacBook so far. Size Rumors suggest the low-cost MacBook will have a display that's around 13 ...
Mac Pro Feature Blue

What's Happening With the Mac Pro?

Wednesday December 31, 2025 9:59 am PST by
Apple hasn't updated the Mac Pro since 2023, and according to recent rumors, there's no update coming in the near future. In fact, Apple might be finished with the Mac Pro. Bloomberg recently said that the Mac Pro is "on the back burner" and has been "largely written off" by Apple. Apple apparently views the more compact Mac Studio as the ideal high-end pro-level desktop, and it has almost...

Top Rated Comments

ouimetnick Avatar
51 months ago
They really need to release 12.2.1 and fix this sleep issue NOW. Why do show stopping bug fixes need to wait until 12.3?
Score: 21 Votes (Like | Disagree)
sideshowuniqueuser Avatar
51 months ago

By the way, and just out of curiosity, how do bugs like this get past beta testers?
As a software dev, the real question I ask is, how do these bugs even make it past the dev team in the first place, let alone the test team?

Beta testing should only be catching any bugs involving combinations of other software or hardware that cause unforeseen complications. These should be rare and unusual, and virtually impossible for the dev/test team to test for. However, I suspect the type of people that use beta testing releases are either nutjob fanb**s who accept anything Apple throws at them and cheers it along; or devs who are merely testing their own products on the upcoming updates. Thus, no one is actually doing any testing with beta releases. Either that, or Apple ignores the feedback.

Who knows. The constant rubbish that comes out of the Apple software divisions is mind blowing to me.
Score: 7 Votes (Like | Disagree)
TheYayAreaLiving ?️ Avatar
51 months ago

They really need to release 12.2.1 and fix this sleep issue NOW. Why do show stopping bug fixes need to wait until 12.3?
I agree. This fix should have been released urgently. Lately, I’ve been turning off the Bluetooth manually without having to rely on Touch Bar and it’s getting annoying.
Score: 5 Votes (Like | Disagree)
creativesmith Avatar
51 months ago
By the way, and just out of curiosity, how do bugs like this get past beta testers?
Score: 5 Votes (Like | Disagree)
MacMan988 Avatar
51 months ago
They should fix this issue faster than that.
Score: 4 Votes (Like | Disagree)
creativesmith Avatar
51 months ago

The software development process isn't that great for single fixes. You have a development line and releases fork off of that. If you make multiple forks, you have to apply the fix to all of the lines and also test them all. So instead you have the mainline and you fork a release and then you apply changes to the release and mainline along with the accompanying testing.
Yes, the process. But someday, if Apple becomes a big company with lots of employees and buckets of cash, maybe then they'll— nah.
Score: 3 Votes (Like | Disagree)