1.5.2 and 1.5.1 launching won't work on a mac

On a mac, the launcher won't start 1.5.2, and 1.5.1 correctly. The window glitches out by flashing randomly, and doesn't start up. 1.6 works fine

What I expected to happen was 1.5.2 to start up correctly, and 1.5.1 starts correctly

What actually happened was the window flashes randomly, doesn't start up

Steps to Reproduce:
1. Create new profile selecting 1.5.2 or 1.5.1 (OSX)
2. Game Directory can or can't be selected
3. Log in