User level: Level 1 (4 points)I recently updated my M1 MacBook Pro(A2338) 2020 model to macOS 27, and since the update, I’ve been experiencing abnormal behavior with the power button:
anyone know solutions please revert back
[Edited by Moderator]
Posted on Oct 19, 2026 6:40 AM
User level: Level 9 (72,871 points)Oct 19, 2026 7:03 AM in response to narendra833
The default behavior is as follows:
Touch ID/Power button behavior
More info: Sleep, log out, and shut down shortcuts - Apple Support
To put your Mac to sleep, do any of the following:
More info: Put your Mac to sleep or wake it - Apple Support
The long press only applies when you are starting from the Mac being shut down. With the Mac shut down, hold the Touch ID/power button until the 'loading startup options' message or the options screen appears.
How to start up from macOS Recovery - Apple Support
The above are the expected behaviors. If your single press (#1 above) is a long press, that is triggering a hard shutdown. A short press will lock the screen, which is what happens on my 16" M4 Pro MBP running macOS Golden Gate 27.0.1.
If you are not seeing the expected behavior, then see if the problem is present when you boot in safe mode. That process performs some system cleanup and clears caches, and also disables 3rd party extensions that may cause problems.
Start up your Mac in safe mode - Apple Support
If that does not correct the issue, test in a new user account. A newly-created user account will have all settings at default, and if the issue does not occur in that new account then it provides guidance on what may need to be changed to correct the issue.
Add a user or group on Mac - Apple Support
Once the testing is complete, the new account can easily be deleted.
Delete a user or group on Mac – Apple Support
Those steps will help to isolate the problem.
It might help to download and run EtreCheck, written by a long-time forum member. The free version is fine. Post the full report using the Additional Text button. No personal information is revealed.
User level: Level 10 (123,805 points)Oct 19, 2026 8:51 AM in response to narendra833
Predicated on the supplied information and given that the power button on your 2020 M1 MacBook Pro (A2338) behaves abnormally following the macOS 27 update, having the computer evaluated by Apple is a reasonable next step.
Because the issue affects normal power control and access to macOS Recovery, Apple can run diagnostics to help determine whether the cause is software, firmware, or hardware-related.
Since the cause cannot be reliably determined through basic troubleshooting, I recommend having the MacBook evaluated by Apple to identify the underlying issue and determine the appropriate corrective action
Have the computer evaluated by the Professionals who have the Special Hardware Software and Expertise to diagnose the issue and offer possible solutions
Make an Appointment at the Apple Genius Bar or call 1 800 MyApple and have them evaluate the computer
Other location Call Centres
Originally posted at discussions.apple.com/thread/256378940