Put the summary of the bug you're having here
*What I expected to happen was...:*to download and work
Describe what you thought should happen here
*What actually happened was...:*it crashed when i was trying to download the new update 1.6.1
Describe what happened here
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...
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I'm reading an OpenGL error which I believe might make this a Duplicate of MC-998 but also just wondering (not a Mac user) is your Java up to date as I know PC java is at 7 while your report says 1.6 (again maybe Mac Java is at 1.6).