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macOS Tahoe 26.3 Beta 3 - Bug fixes, changes, and more

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
WilliApple

WilliApple

macrumors 65816
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Feb 19, 2022
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263b3.png

Release Date ― 26 January 2026
Build Number ― 25D5112c
Apple Silicon System Firmware Version ― 13822.80.422.501.1
T2 BridgeOS System Firmware Version ― 23.16.13113.5.3
New Features & Changes (Found something new? Please press "Edit" on the bottom of this post and add it here)
Resolved Issues
  • Dictionary toolbar does not have the blur effect for content that scrolls (FB20961118; present since 26.0)
New Issues
  • Some major graphical issues may be present in this beta.
    • Present since (26.3 Beta 3)
(If you are encountering any issues, please press "Edit" on the bottom of this post and add it here)
Remaining Issues
Untested Issues
  • On non notched devices, the volume indicator may have excessive padding in full screen (Present since 26.2 Beta 3)
  • Alarms may not play when your display is asleep for a long period of time (FB10086690)
    • Workaround: Make your display not fall asleep in Settings > Lock Screen > Turn display off on ____ when inactive. You can turn your brightness off.
    • Issue present since macOS 13.0
    • 12-Hour times is displaying noon times as 00:00PM - 00:59PM instead of 12:00PM to 12:59PM
Additional Notes
  • Please know, Memory Management has always been an issue on any OS (not just Apple's). If you believe there is a Memory Leak, please go to the Apple Menu > Restart > Restart to fix it.
  • When a new macOS release comes out, all issues automatically go to "Untested Issues" until they are moved by someone. Issues that stay in Untested for 3 releases (beta or smooth) will be removed from all future threads. When there is a new macOS release, please be sure to let us know about the issue's status by moving it to either "Remaining Issues" or "Resolved Issues"
  • macOS 26 Tahoe will be installed via a Delta Update in System Settings. Please be aware about this, as the update won’t install with an installer.
  • macOS 26 is officially supported on the following devices. If your device is not listed below, it has unfortunately been dropped by Apple. Any efforts of trying to get your Mac running macOS 26, including bugs should be discussed in this thread.
    • MacBook Air: M1, M2, M3, M4
    • MacBook Pro: 2019 (16 Inch only), Intel 2020 (4 thunderbolt port only), M1, M1 Pro/M1 Max, M2, M2 Pro/M2 Max, M3/M3 Pro/M3 Max, M4/M4 Pro/M4 Max, M5
    • Mac mini: M1, M2/M2 Pro, M4/M4 Pro
    • iMac: 5K 2020, M1, M3, M4
    • Mac Pro: 2019, M2 Ultra
    • Mac Studio: M1 Max/Ultra, M2 Max/Ultra, M3 Ultra, M4 Max
  • macOS Tahoe 26.3 Release Notes
  • macOS Tahoe Overview
  • Apple Security Updates
  • Become an Apple Beta Tester
  • Full Installer (Direct Download)
 
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  • Love
Reactions: Adora
Downloaded faster than I could breathe (desperate for Intel performance increase).
Also love these new graphical glitches that were introduced.

Screenshot 2026-01-26 at 3.38.44 PM.png
Screenshot 2026-01-26 at 3.38.48 PM.png
 
  • Like
Reactions: dumiku
Be aware...

After updating to 26.3 B3, my monitor setup no longer works.

I have two LG Thunderbolt monitors. One is connected to my Mac Studio, and the other one is daisy-chained off the first one. This was working 100% fine until this evening, when I updated to 23.3 B3.

Now only the monitor connected directly to the Mac Studio works, and though the Mac Studio "sees" the 2nd monitor (in System Information / Hardware / Thunderbolt/USB4), it is not receiving a video signal.

I disconnected both monitors, connected only the one, and macOS starts up fine. Then I plug in the second monitor, and nothing happens. Several reboots, etc., also did not make a difference.

The only way I can get both monitors to work is by connecting the second monitor to HDMI...
 
  • Wow
Reactions: FatLouie
Killerbob said:
Be aware...

After updating to 26.3 B3, my monitor setup no longer works.

I have two LG Thunderbolt monitors. One is connected to my Mac Studio, and the other one is daisy-chained off the first one. This was working 100% fine until this evening, when I updated to 23.3 B3.

Now only the monitor connected directly to the Mac Studio works, and though the Mac Studio "sees" the 2nd monitor (in System Information / Hardware / Thunderbolt/USB4), it is not receiving a video signal.

I disconnected both monitors, connected only the one, and macOS starts up fine. Then I plug in the second monitor, and nothing happens. Several reboots, etc., also did not make a difference.

The only way I can get both monitors to work is by connecting the second monitor to HDMI...
Click to expand...

Looks like they are making some updates to the graphical subsystem, which is a good thing. Just submit feedback and use HDMI for now .
 
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Reactions: Killerbob
fisherking said:
yikes, something is up with your mac, am not seeing anything like that. worth investigating....
Click to expand...
Nothing is up with my Mac, looks like they're updating the graphics subsystem, it's an Intel Mac Pro 2019.
This didn't happen Beta 2, but I do see that it's much snappier, but with new glitches and bugs.
 
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Reactions: hieubui
SDAVE said:
Nothing is up with my Mac, looks like they're updating the graphics subsystem, it's an Intel Mac Pro 2019.
This didn't happen Beta 2, but I do see that it's much snappier, but with new glitches and bugs.
Click to expand...
my brother is on an intel macbook pro, and hasn't seen anything like that. it might be worth looking into (or, at least, start a thread here) & see if anyone else on an intel mac has seen this. just a thought...
 
fisherking said:
my brother is on an intel macbook pro, and hasn't seen anything like that. it might be worth looking into (or, at least, start a thread here) & see if anyone else on an intel mac has seen this. just a thought...
Click to expand...

His Intel MacBook Pro doesn't have a 6900XT from AMD...They're most likely updating the drivers, there's major graphical slowdowns with Intel Mac Pros with AMD GPUs. I'm too lazy to check the kexts from previous versions, but I welcome the speediness of things.
 
  • Like
Reactions: fisherking
Killerbob said:
Be aware...

After updating to 26.3 B3, my monitor setup no longer works.

I have two LG Thunderbolt monitors. One is connected to my Mac Studio, and the other one is daisy-chained off the first one. This was working 100% fine until this evening, when I updated to 23.3 B3.

Now only the monitor connected directly to the Mac Studio works, and though the Mac Studio "sees" the 2nd monitor (in System Information / Hardware / Thunderbolt/USB4), it is not receiving a video signal.

I disconnected both monitors, connected only the one, and macOS starts up fine. Then I plug in the second monitor, and nothing happens. Several reboots, etc., also did not make a difference.

The only way I can get both monitors to work is by connecting the second monitor to HDMI...
Click to expand...
I had similar issues with B2, though mine are connected with USB-C & HDMI. Though with not with a video signal, but just messing up resolution, or which is main monitor when one is off. Seems a bit better in B3 but it deffo needs more fixing.
 
Mac_fan75 said:
I had similar issues with B2, though mine are connected with USB-C & HDMI. Though with not with a video signal, but just messing up resolution, or which is main monitor when one is off. Seems a bit better in B3 but it deffo needs more fixing.
Click to expand...
I've had this bug bite before with earlier betas and an M2 Mac mini connected to two 27-inch Apple Thunderbolt displays via the Thunderbolt ports and two Apple TB2 to TB3 adapters. Luckily, it has not bitten this time BUT I do have a problem with FaceTime not seeing the ATD cameras although they are listed in the Thunderbolt/USB4 system. The hope (!) is that enough people with your setup file bug reports using FBA and Apple responds in a timely manner. Apple's Thunderbolt support has gotten worse and worse in recent OS updates and I wonder if it will finally disappear in Macs as USB5 (aka USB4 version 2.0 and a future USB6 get faster.
 
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