Hi chippwalters - the OSX version of MoI is not currently compatible with the just recently released OSX version 10.8 Mountain Lion.

I do expect to have an update for MoI that should fix this up though, the next v3 beta will have the update in it and if that seems to go ok then I will also roll out a version of 2.5 with that as well.

For the time being though the OSX version of MoI will only run on OSX 10.6 or 10.7 which are the ones currently listed as supported on the download page.

- Michael