Open quit. Doesn't even do anything. Just the icon appears in the dock and then vanishes.
No error warning or anything.
Nobody else is having this problem? I think it started with Mountian Lion.
I'm on a Retina MacBook Pro i7 2.7 ghz mid 2012 model.
i've run all versions of Marathon before on this. but since the latest OS X updates there has been issues.
This is a recent install, the current system i'm running so It's nothing wrong there.
Please help?
