Hi there!
I followed the instructions from this article and it helped me ALOT! Very simple fix it looks like! Try it out, I hope it works for anyone who is having this issue.
https://blogs.adobe.com/kevinmonahan/2014/09/10/premiere-pro-cc-freezing-on-startup-or-crashing-while-working-mac-os-x-10-9-and-later/