Nope, still doesn't work. The terminal executes the command without any error popping, but nothing happens.
If the problem comes from Unity though, it's definitively my OS that is too old. The recent versions of Unity work only for Mac 10.8+.
Dang. I really hope that isn't it. A lot of people have older Macs and I'd hate for them to be blocked from playing. The game isn't even THAT complex. I'll try to see if Unity let's me build to at least as far back as 10.6.
Worst case, I'll have to put OSX 10.8 as the minimum specs.