Crash when logging in with a resource pack on mac

Put the summary of the bug you're having here

What I expected to happen was to log in properly
Describe what you thought should happen here
Open up properly
What actually happened was that the resourse pack kept making my game crash
Describe what happened here
I logged in and my game kept crashing
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...