FabricioAcm96 wrote:
I have a MacBook Air M1, and after updating to macOS 26 I noticed that when I press the keys to adjust the volume and screen brightness, the on-screen indicator showing the adjustment no longer appears. I have already tried restarting the computer, but nothing has changed.
[Edited by Moderator]
Have you tried restarting in Safe Mode.
Then test if the Volume appears where it should

Sometimes a Safe Boot followed by a Normal Boot will just put things right.
If not - there could be something in the main User Account playing up. To further isolate this - Set up users, guests, and groups on Mac. Then log out of the Main User account and log into the dummy account and test again if the issue persists.
If the issue is present in the dummy account - then, this appears to be a System Wide issue on the computer.
To avoid a session of Q&A, Q&A and Q&A
Download the Application Etrecheck ( External Link ) directly from the Developer.
The Application is Not a " Silver Bullet " and is only a tool to examine the Hardware / Software used on this computer
This is a Diagnostic Tool that makes no changes to the computer Hardware / Software used on this computer
The application is free or paid from added features.
The Report will Not Reveal Any Personal Information.
Post back the Full Report - copy and paste - >>>> using the Additional Text Icon ( 3rd Icon to last ) <<<<