"Failed to read (number) bytes" GMod (Mac)

So, where to begin in this thread. So lets say about Dec. 2014 this game was running good besides the lag and there wasn’t a problem launching the game. Now I cant even play it, when I hit launch a blue screen appears and says “Loading” in the bottom right. Say 30 seconds later a tab appears and says… well it’s in the title. And I have tried everything, I reinstalled twice, I rebooted my computer, I deleted ALL my addons and nothing. I have emailed facepunch about a week before this, and no response, now I ask you forums. HALP PLZ…

[editline]22nd February 2015[/editline]

Feel free to reply if you have any suggestions!!

[editline]22nd February 2015[/editline]

Is this unsolvable?