Apple Releases macOS Monterey 12.3.1 With Bluetooth and Display Fixes - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

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

iOS 27 on iPhone 17 1

iOS 27 Will Add These New Features to Your iPhone

Saturday May 2, 2026 8:43 am PDT by
Apple is expected to unveil iOS 27 during its WWDC 2026 keynote on June 8, and there are already many rumored features and changes for iPhones. The first developer beta of iOS 27 will likely be available immediately following the keynote, and a public beta typically follows in July. Following beta testing, the software update should be released to all users with a compatible iPhone in...
Apple Event Logo

Apple Just Released a New Accessory

Monday May 4, 2026 8:13 am PDT by
Apple today released a new Pride Edition Sport Loop for the Apple Watch. The band features a rainbow design with 11 colors of woven nylon yarns. The new Pride Edition Sport Loop is available to order now on Apple.com and in the Apple Store app in 40mm, 42mm, and 46mm sizes, and it will be available at Apple Store locations starting later this week. In the U.S., the band costs $49. There...
Apple MacBook Pro M4 hero

Why You Might Want to Wait to Buy a MacBook Pro

Friday May 1, 2026 3:43 pm PDT by
Apple refreshed the 14-inch and 16-inch MacBook Pro with M5 Pro and M5 Max models in March 2026, but depending on your needs and interests, you might want to skip this generation because there's something better in the works. The M5 Pro and M5 Max MacBook Pro models have faster chips, but the same design that Apple has used since 2021. An updated design with new display technology and faster ...

Top Rated Comments

Station Grey Avatar
54 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
54 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
54 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
54 months ago
Yay! More bugs are being squashed.
Score: 10 Votes (Like | Disagree)
Populus Avatar
54 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)
54 months ago

Is it only for certain Macs?

Not seeing it yet on my M1 Mac Mini in the UK.... Though watch it appear now I've posted this.....
No, but if you have criticized Apple here in the MacRumors forum, they probably put you on the wait list.
Score: 6 Votes (Like | Disagree)
Related Apple News: Culture | Buyers Guide | Ipad | Reviews | Lifestyle