Hi there!
We have an application that exists for more than 10 years (Appkit, Obj-C), and since the very beginning we're using CMD+ESC as a keyboard shortcut for a very important function in our app. Until now, this worked great.
Recently, when macOS 26.1 released our app started to not responding to CMD+ESC anymore for some of our customers - it seems like CMD+ESC never gets to our app at all. First, we though it's happening because Game Overlay is also using CMD+ESC by default, but when we turned that off, or switched that to something else in macOS's Keyboard preferences, the issue still persisted.
The, we realized this has something to do with iCloud - so, if you turn off iCloud, do a log out and log in to your computer, and it's magically starts working again, as it always did.
More strangely, this issue doesn't happen for everyone - for many of our customers, the issue seems to doesn't exist for some strange reason.
Anyone have any idea what could be happening here?