I have four Macs that have been updated to Tahoe 26.2. Only one has this issue.
In my case the Mac mini with M1 chip has exhibited issues with the Music app launching spontaneously.
That seems to have abaited. But recently I have been seeing notice banners about sound settings. What
appears to be happening is that the sound level (volume) is being set arbitrarily in the background. Mostly
it is being turned up. That appears to generate the events that cause the banner to show and then go away.
But less that a second or so latter it shows up again. If I open the sound setting preference from the menu
bar along the top and let it stay opened I can see the sound level changing on its own.
So I don't know if this is the same issue this is about. But I have the mini with M1 (the one with the issue),
and Macbook Pro with an intel chip from around 2022, an iMac from 2025, and another Macbook pro with
an M3 chip (that was purchased as a refurbished unit). Again only the mini has the issue.
I do have both a wireless track pad and mouse that connect via bluetooth. I have been disconnecting them
and there appears to be no difference.
So is this the same issue, or close enough?
I just had a thought: I have Zoom installed. I deleted it on the M1. That did not solve the issue. But I did attend a
Zoom hosted gathering and noticed that the sound level was being arbirarily turned DOWN.Is it possible that
those with the issues have installed some version of Zoom?
Thank you for time and attention
JK