I used to use CMD+G after selecting images in the library module to group these images (staple). Now CMD+G brings up the Lightroom settings:
Why is that? The keyboard help screen in LR also shows that CMD+G is used for stapling:
Sorry, menus in German.
I'm on Mac OS 10.12.6 and use LR Classic 7.4. Did not change keyboard mapping, wouldn't know how to anyway.
It's a bug. Take a look here:
Oh wow, I missed that... Thanks Axel!