Apple Releases macOS Monterey 12.3.1 With Bluetooth and Display Fixes

Apple today released macOS Monterey 12.3.1, a minor update to the macOS Monterey operating system that launched in October. macOS Monterey 12.3.1 comes two weeks after the launch of macOS Monterey 12.3, an update that brought Universal Control.

macOS Monterey 2
The ‌‌‌‌‌macOS Monterey‌‌ 12.3‌‌.1 update can be downloaded on all eligible Macs using the Software Update section of System Preferences.

According to Apple's release notes, macOS Monterey 12.3.1 introduces a fix that could cause Bluetooth controllers like game controllers to disconnect from the Mac after playing audio through some Beats headphones. It also addresses a bug that could cause USB-C or Thunderbolt external displays to not turn on when connected to the 2018 Mac mini as a secondary display.

This update fixes the following issues:
- USB-C or Thunderbolt external display does not turn on when connected to Mac mini (2018) as a second display
- Bluetooth devices, such as game controllers, may disconnect from your Mac after playing audio through some Beats headphones

macOS Monterey 12.3.1 also addresses two vulnerabilities, including an AppleAVD issue that could allow an application to execute arbitrary code with kernel privileges and an Intel Graphics Driver issue that could allow an application to read kernel memory.

Apple says these exploits may have been actively exploited, so it is a good idea for all users to update as soon as possible.

Today's macOS Monterey update was also accompanied by iOS 15.4.1, iPadOS 15.4.1, tvOS 15.4.1, watchOS 8.5.1, and new 15.4.1 software for the HomePod.

Related Forum: macOS Monterey

Popular Stories

Alleged iOS 19 Icons Front Page Tech

iOS 19 Leak Reveals Alleged New Design With Rounder App Icons, Floating Tab Bar, and More

Monday April 7, 2025 3:13 pm PDT by
YouTube channel Front Page Tech is back today with another video that provides a closer look at iOS 19's alleged design changes. The video contains re-created renders of iOS 19, which are allegedly based on real footage of the software update, provided by sources within Apple. Overall, iOS 19 is expected to have a more glass-like, visionOS-inspired design, with added translucency for user...
iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

iPhone 17 Pro's New Rear Camera Bar 'Same Color As Rest of Device'

Monday April 7, 2025 2:09 am PDT by
Apple's upcoming iPhone 17 Pro models will feature a redesigned rear camera panel that spans the width of the device, but it will be the same color as the iPhone itself, rather than being part of a two-tone design. That's according to Bloomberg's Mark Gurman. Writing in his latest Power On newsletter, the reporter says the iPhone 17 Pro won't have a two-toned back, as some renders have...
iphone x front back

Apple Planning 'Bold' New 20th Anniversary Design for 2027 iPhone Pro

Monday April 7, 2025 2:46 am PDT by
Apple is preparing a "major shake-up" for the iPhone's 20th anniversary in 2027, according to Bloomberg's Mark Gurman. iPhone X released in 2017 for 10th anniversary Writing in his latest Power On newsletter, Gurman says that Apple plans to launch a foldable iPhone alongside a "bold" new iPhone Pro model that makes more extensive use of glass. Could this mean Apple plans to realize former...
iPhone Assembly

Trump Believes Apple Could Manufacture iPhones in the U.S.

Tuesday April 8, 2025 12:08 pm PDT by
U.S. President Donald Trump "absolutely" believes that Apple could manufacture its iPhones and other devices in the United States, Press Secretary Karoline Leavitt said today during a media briefing. Leavitt was asked whether Trump thought that iPhone manufacturing is the kind of technology that could move to the U.S. "Absolutely, he believes we have the labor, we have the workforce, we have ...
iphone 16 pro colors 1

Is Now the Time to Upgrade Apple Devices Before Tariffs Lead to Price Increases?

Friday April 4, 2025 3:41 pm PDT by
If you have an older Apple device that you've been considering upgrading, you're probably wondering how the newly announced tariffs might impact prices going forward, and whether it's worth buying now before there's a price hike. Given analyst and economist responses to the tariffs, market panic, and Trump's stance on the current financial chaos, the answer is that making a purchase...
iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

5 Biggest Changes Rumored for iPhone 17 Pro

Tuesday April 8, 2025 2:38 am PDT by
Later this year, Apple will introduce the iPhone 17 series, which includes the iPhone 17 Pro and the iPhone 17 Pro Max, two new high-end flagship devices that will be sold alongside the regular iPhone 17 and an all-new ultra-thin iPhone 17 Air. If you have been holding out for the iPhone 17 Pro or its bigger sibling, here are five of the biggest changes, informed by the latest reports and...
Apple Vision Pro 2 Feature 2

Vision Pro 2 May Now Be in Production Ahead of Launch Later This Year

Tuesday April 8, 2025 9:13 am PDT by
The second-generation Apple Vision Pro may now be in mass production ahead of its rumored launch later this year, Chinese website IT Home today claims. Reporting on information from an unknown source, the website says that key components of the new Vision Pro, including panels, housings, and circuitry, have moved into mass production ahead of the product's purported release later in 2025....
iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

iPhone 17 Pro Models Rumored to Offer Dual Video Recording Feature in Camera App

Tuesday April 8, 2025 7:23 am PDT by
YouTube channel Front Page Tech on Monday shared renders of iOS 19's alleged new design. The end of the video also revealed a new feature that is supposedly planned for the iPhone 17 Pro models later this year: dual video recording. According to Front Page Tech host Jon Prosser, the iPhone 17 Pro and iPhone 17 Pro Max will allow users to record video with the front and rear cameras...

Top Rated Comments

Station Grey Avatar
40 months ago
Bit alarming that the external display bug is referenced purely as a Mac mini 2018 issue, rather than on iMacs and MBPs too - either they haven't fixed the issue for all, or they don't know fully understand what the issue was.

Still, nearly download on my iMac 2017 with dual, borked external displays so will soon find out.

Edit: Yes, it fixed it.
Score: 25 Votes (Like | Disagree)
tmoerel Avatar
40 months ago

At this point, can anyone tell me if there are still any memory leaks in Monterey? Or have been fixed all of them?

Any other major bug on Monterey? Or is this a safe release to jump from Big Sur?
An operating system contains millions of lines of code. It will never be perfect and there will always be some memory leak somewhere. But the major ones seem to be under control.
I work in software Quality Assurance and I can guarantee you that perfect software does not exist!
Score: 17 Votes (Like | Disagree)
MacFin Avatar
40 months ago
I hope this also fixes the issue with Quick Previews. After a while, hitting the space bar only shows a tiny thumbnail instead of previewing the file as it should. The only way to fix this is to restart Finder which is frustrating since it will usually close all Finder windows.
Score: 15 Votes (Like | Disagree)
TheYayAreaLiving ?️ Avatar
40 months ago
Yay! More bugs are being squashed.
Score: 10 Votes (Like | Disagree)
Populus Avatar
40 months ago
At this point, can anyone tell me if there are still any memory leaks in Monterey? Or have been fixed all of them?

Any other major bug on Monterey? Or is this a safe release to jump from Big Sur?
Score: 8 Votes (Like | Disagree)
VictorTango777 Avatar
40 months ago

An operating system contains millions of lines of code. It will never be perfect and there will always be some memory leak somewhere. But the major ones seem to be under control.
I work in software Quality Assurance and I can guarantee you that perfect software does not exist!
Before any problem can be fixed, the company first has to admit that there is a problem, not ignore it or claim ”it’s a feature, not a bug”.
Score: 6 Votes (Like | Disagree)