Thanks Neda for your advice.I turned off the caps lock icon on macOS Sonoma (via Terminal) and that appears to have fixed the issue (I found an online tutorial to work out how to do this - https://droidwin.com/how-to-turn-off-caps-lock-icon-on-macos-...

I'm having the same issue. After seeing your comment I tried removing the Add-ons folder from the ArchiCad 26 folder, but was then unable to open archicad (receiving a failure message indicating Add-ons were missing). I'd appreciate any further advic...