[TheDopp]

Yes this is now a common steam problem. You're probably even pressing it more than once, thus re-closing it before it can properly show up. It can now take like 30 seconds for the GOUI to show up from the main menu. Steam and all associated products just get slower and slower and more bloated every patch.

Its called Apple Software. Enjoy the future.

Actually CMD+Tabbing on the mac is better than Shift+Tab or Alt+Tab Windows side.
If it's the future, I welcome it.