MacOS app does not run on the Xcode simulator

Question

I\'ve installed Xcode 4.2.1 on Mac OS X Lion.

When I create a new (Mac OS X Cocoa) project and I click \"Run\", Xcode says build succeeded, but does

Answer 1

I had similar problems. I found that the problem was in ~/.gdbinit file. And a second time - at the window initialization function loadWithNibName/initWithWindow (wrong name nib file or frame properties). Also check the file Info.plist in your project (parameters "Main nib file base name" and "Principal class").