Concerning Mac Graphical issue current at this moment. As user:Auge pointed out on the Steam Forum

Quote Originally Posted by Citan
... The new patch is live! You can read the patch-notes on the login screen. (And they'll be in the other usual places later today.)

ATTN MAC USERS WHO SEE AN OPAQUE SCREEN WHEN THEY PLAY! We still can't repro the problem on our Macs, unfortunately, but we have some hypotheses on the cause. So in this update we've added three "hacks" that might work. We need you to try them out and let us know if they help!

While in-game, open the Settings window and find the Special Settings tab. In the text box, type the words MacHack1 MacHack2 MacHack3 and save your settings. This will enable all three hacks. The effect should be immediate: you'll instantly either be able to see stuff... or you won't. If none of these work, we'll try some more hacks soon!

If the hacks DO help, please let us know which one(s) are needed. You can remove each of the words in the settings box to turn off the corresponding hack. Remove MacHack3 first and see if the problem comes back; if not, try removing MacHack2 or MacHack1. It may be that several combinations of hacks remove the problem -- that info would also help us narrow it down.

These hacks are VERY hacky. They disable major graphical systems (like the entire weather system!). The game will definitely be uglier with these hacks on, but hopefully the game will be playable. And once we know of a hack that helps, we can start refining the hack with less-aggressive mini-hacks. Once we have some clues to start with, we may reactivate the Steam "beta" channel to iterate on the problem more quickly. Thanks for your patience! "

If you are still having problems or can't get to setting to make changes then

If you need technical support, please try the steps of the official Project: Gorgon forums Troubleshooting Thread starting post. Try to complete the steps that can be done, pretty much the same, on the Mac.

If you require specific support, you can email them at support(at)projectgorgon.com.