For some reason I can't get some 3rd party apps to open on my Macbook Pro. I have OS X 10.8.3. Gatekeeper has been turned off since the beginning. It's mostly apps that don't have installers and you just drag to the Applications folder. When I double click on them, nothing happens. Apps that have pkg installers work no problem. I tried doing a clean of install of Mountain Lion and still encounter the issue. It seems like I'm the only one with this problem. Anyone have any ideas?