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macOS 26.1 RC - 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
Original poster
Feb 19, 2022
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Release Date ― October 28, 2025
Build Number ― 25B77
T2 BridgeOS System Firmware Version ― Pending
Apple Silicon System Firmware Version ― 13822.41.1
Features & Changes (Found something new? Please press "Edit" on the bottom of this post and add it here)
Resolved Issues
New Issues (If you are encountering any issues, please press "Edit" on the bottom of this post and add it here)
Remaining Issues
Untested Issues
  • 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
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 and 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
    • 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 26.1 Release Notes
  • macOS Tahoe Overview
  • Apple Security Updates
  • Become an Apple Beta Tester
  • Full Installer (Direct Download) - pending
 
Last edited:
Careful on trying to install the RC while your Mac is connected to an external monitor. My Mac stopped displaying anything on the internal or external displays. It was completely unresponsive to inputs and I had to hard shutoff and try again (so holding the power button did actually shut it down, but there was just no visual or audio indication other than pressing the power button again after 10s or so triggered bootup). It did this for beta 2 for me too. It might have still been updating but there was no way to tell.
 
Trying to update my MacBook Pro M5 from 26.0.1 to 26.1, but the download keeps failing after several seconds with the error message:

macOS could not be downloaded.
Make sure you're connected to
the internet and try again, or
contact Apple support for
assistance.
An error occurred while
downloading the selected updates.
Please check your internet
connection and try again.

Am I the only one?
 
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I haven't been able to update to 26.1 RC on the M5 MacBook Pro. Just noticed it's not in the list above. That does mean it's really not supported, at least with the RC version?
 
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Robotronic said:
Trying to update my MacBook Pro M5 from 26.0.1 to 26.1, but the download keeps failing after several seconds with the error message:

macOS could not be downloaded.
Make sure you're connected to
the internet and try again, or
contact Apple support for
assistance.
An error occurred while
downloading the selected updates.
Please check your internet
connection and try again.

Am I the only one?
Click to expand...
I’m see the same error. Tired everything. Must be a M5 issue.
 
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Wake from sleep used to feel sludgy and ragged in 26.0.1. Just woke my M1 Max MacBook Pro from sleep after leaving it alone for about 75 minutes clamshell closed and no power connected and its still at 100% and the wake was smooth as butter. Really as smooth as it's ever been. This is promising and I don't want to get my hopes up too much.
 
Robotronic said:
Trying to update my MacBook Pro M5 from 26.0.1 to 26.1, but the download keeps failing after several seconds with the error message:

macOS could not be downloaded.
Make sure you're connected to
the internet and try again, or
contact Apple support for
assistance.
An error occurred while
downloading the selected updates.
Please check your internet
connection and try again.

Am I the only one?
Click to expand...
I got the exact same error on my M5 MBP too. Guess there’s gonna be an RC2 / official release with an incremented build number next week.
 
Music app is completely broken for me

I don't use it but it hogs the file association for all sound related extensions so I'd double click something and up pops Music and it just spins and spins and never loads the file or plays any sound
 
My Music app opened even twice after the reboot. Only offline music is working.

Everything in here:

Screenshot 2025-10-29 at 06.49.12.png


Is just showing this:

Screenshot 2025-10-29 at 06.49.29.png


Also still Dark Mode is not working anymore for most parts of macOS especially all apps from Apple.

The strange thing is this already happened in Beta 3 when my Mac woke up and Beta 4 had just been released a few hours ago but not downloaded or installed, there wasn't even an indicator on the System Settings icon yet, I only saw on YouTube that a new Beta had been released.

Before me and my Mac went to sleep Dark Mode worked normal.

I switched on hide Menu Bar and can't undo it anymore. It's always disappearing again with every setting. I haven't tried another reboot since this happened.
 
Sorry guys, this is a rant.. just downloaded and installed public beta of 26.1: I have to say that the difference between glass and tinted is barely discernible.. utterly useless.
On another note, I need to vent because Mac OS 26 has been a total let down, total let down starting from the toyish round corners everywhere to the blinding white of windows and last but not least for the Launchpad demise.
Sorry guys, I needed to say. Thanks!
 
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Mission Control and spotlight is so laggy and has a poor frame rate on Tahoe. Was super smooth on macOS sequoia.

M2 MacBook with 16GB ram.

How is performance in this release? Any smoother or still frame rate issues?
 
jamiebrown6 said:
Mission Control and spotlight is so laggy and has a poor frame rate on Tahoe. Was super smooth on macOS sequoia.

M2 MacBook with 16GB ram.

How is performance in this release? Any smoother or still frame rate issues?
Click to expand...

Anecdotally, 26.1 RC feels better than 26.0 or 26.0.1 did on my base 15 inch M2 Air.

I don't use MC, but multitasking windows and scrolling in Safari feels smoother.

I think they better optimized it and possibly updated the graphics drivers to be less crappy.
 
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