Black screen with OS X and Beta 1.0 to Beta 1.8.1

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What I expected to happen was...:
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What actually happened was...:
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Steps to Reproduce:
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2. ...
3. ...

The screen of the game shows something like a skeleton face randomly spazzing all over the screen. I thought the game would load normally.
The actual version of game is "b1.0" through to "b1.8.1"
1. Use newest launcher and make new profile.
2. set directory an extra folder in (told by AntVenom to prevent problems)
3. Tick any of the version boxes, set ver. to b...
4. use new profile and click play