[Crash] - Bugsplats

I'm running osx 10.9.5 and my 4.20 League keeps crashing :-/ it will sometimes join a game and play for a few minutes but then crash, and will crash upon trying to reconnect during the load thing before the game will even restart.

I'm getting these exceptions:

Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000039f5000