I have a macbook pro and i have the same exact problem. SO far i was able to delete any extra folders that were related to project zomboid. THis allowed to be able to play solo on the new beta version. When i try to host a game or join one my game crashes though
I run a MacBook Pro early 2011
Processor: 2.3 GHz Intel Core i5
Memory: 4 GB 1333 MHz DDR3
Graphics: Intel HD Graphics 3000 384 MB