I'm having big trouble playing Rust! PLEASE HELP!

Okay. So I am new to Mac and installed Steam and Rust. But when I load Rust on the Mac it doesn’t pop anything up or load anything. Can someone please help me I really want this to work! :frowning:

Specs:
Macbook Pro 4,1
Intel Core 2 Duo @ 2.4GHz
4 GB of RAM
GeForce 8600M GT