I can't seem to select any vertices edges or faces in edit mode, blender 2.8, Mac OS 10.12.5 I'm trying all three point/edge/face contexts and using the select tools, yet nothing is selecting. I can't do any modeling! I've read a few other posts pointing to graphics drivers, but I have the best drivers for my system, or at least I've been using this driver for the last 6++ months, and there isn't a newer one available. Am I out of luck for now?

I have 3 nvidia gpus on a 2012 Mac Pro, it's working perfectly in all my other software like c4d, redshift and octane. Nvidia Web Driver 378.05.05.15f01

Please help if you have an idea of what to try next!?
This happened to me when I first started using 2.80 because it was trying to use my 2.79 key maps. That would explain why it is working on other machines where perhaps you don't have 2.79. Toggle the console on and see whether you have error messages at start up.

I don't use a Mac, but if you can work out how to delete your old settings then that might solve it. I have a feeling they added a button to the initial splash screen which allowed you to start fresh.