I upgraded the OS of my mac mini to Mountain Lion this weekend. Unfortunately it messed up all my python settings. When I ssh’d into the mac mini I saw an ugly python error. The gist of which was the following -

“ImportError: No module named virtualenvwrapper.hook_loader”

Basically I just had to Install the Xcode Command Line tools, and that would have fixed everything. Just in case, I also installed pip, virtualenv and virtualenvwrapper again.

It’s all good now :)