Xcode 4.1 GM Not Installing (must quit iTunes) on Lion?

Question

I am trying to install Xcode 4.1 GM on my Lion mac but it\'s not working. When it is almost finished, I get the popup to quit iTunes even though it is already quit. So the

Answer 1

if you boot into single user mode (Press S when starting up), the installation works as it should. Xcode will then function without switching it to 32-bit mode.