Unity hangs on 'Compiling scripts...'

One of our Macs hangs forever when opening our project, displaying the pop-up ‘Compiling scripts…’

Looking in the Unity log file shows:



Platform assembly: /Applications/Unity/Unity.app/Contents/Frameworks/Mono/lib/mono/2.0/System.Xml.Linq.dll (this message is harmless)
Platform assembly: /Applications/Unity/Unity.app/Contents/Frameworks/Mono/lib/mono/2.0/System.Configuration.dll (this message is harmless)
Mono: successfully reloaded assembly

  • Completed reload, in 0.466 seconds
  • starting compile Library/ScriptAssemblies/Assembly-CSharp-firstpass.dll, for buildtarget 9
  • starting compile Library/ScriptAssemblies/Assembly-UnityScript-firstpass.dll, for buildtarget 9

It’s only started doing it recently, and the other Macs open the project fine. I’ve tried deleting the project and recreating it from source control, and tried reinstalling Unity 4.1.3 but it didn’t help.

I also tried creating a new, empty Unity project on the machine and copying all the assets into it. It took several hours to convert but when it was finished the project was usable again. However, when I shut down Unity and tried to reopen the project the issue reoccured.

Can anyone help?

same problem