Mac's are out of my league, P.C.'s I know only a little. Good luck!
This. He wont be able to run the game to see what patch he's on since the game crashes
Did you try verifying your game cache yet?
All operating systems
Verify integrity of game cache
Load Steam
From the Library section, right-click on the game and select Properties from the menu.
Select the Local files tab and click the Verify integrity of game cache... button.
Steam will verify the game's files - this process may take several minutes.
Once the process is completed, the Check Window will automatically exit.
Source
do you know how i could fix that without doing it in-game?
Should be able to change everything in your config.
Ok, i found the config file. but its a .cfg and i cant open it.
right click the .cfg file and open with texteditOk, i found the config file. but its a .cfg and i cant open it.