Minecraft is crashing

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
When I start up the game it usually works fine
What actually happened was...:
Describe what happened here
It crashes no matter what version I play on
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...Start up the launcher on mac
3. ...press play and it should say the game has crashed