Blank dock, command+tab menu icon for application - RubyMine 7.0
Solution 1:
I recover from all sort of temporary dock corruption by killing the dock after saving work and getting ready to restart the Mac.
-
killall Dockfrom terminal app - log out and back in
- restart the Mac
Barring that, you've got more serious corruption, but let's start with the quick triage first.
The next steps would be to make a new user account and repeat installing your app on that user’s desktop and drag it into the dock.