Bug with starting Instruments via Profile under Xcode 4.1 Build 4B110
Epaga's solution sometimes works & sometimes doesn't.
Therefore I suggest everyone duplicates the following open radar so that Apple gives this issue some priority:
http://openradar.appspot.com/9855452
Quoting your comment on this, andi1984, so that no one misses this "big" answer for anyone (like me) for whom it is a lifesaver. This worked great for me!
If I'm opening Xcode, choose Profile and choose one instrument (let's say Leaks) the new Instrument window opens. Then I need to go back to Xcode (while Instrument.app window is still open in background!) and have to use command + tab to choose out of Xcode in front the Instrument.app again. Then the Instrument app shows me the tracked data. Really weird problem, but now it works. ;-)
I had the problem of instruments locking up and the above cmd-tab trick didn't work until I did it such that the dialog "Instruments is trying to access your computer" appeared asking for my password. After I entered the password then I could get to instruments. I suspect the problem is the password dialog is hidden in the Xcode windows. In this case Instruments is frozen because it has the modal dialog open.
So:
- Run Instruments
- Cmd Tab to Xcode covering the instruments. Cycle and hide messages until password dialog is found. Close Xcode
This may be a one time thing... now that I gave Instruments access it may not need the password again.