This is just a random guess and I may be completely wrong here but a friend of mine had a problem with killing floor,and we came to the conclusion it was because he didn't update his video card drivers... Anyway sorry I cant be of much more help than that, good luck!
My Mac drive is up-to-date,Since my Mac informs me everytime when there's an available update,An Software update application pops up and asks me if I am interested updating anything that has an update to apply...
Well thanks,Any comment is somehow helpful... :)
I think I have the same error, Im trying to start a multiplayer server, and gmod just crashes with either "Lua dump error", or "Steam.dll isnt worthy of our trust"
I am not getting any erros,the game just crashes instantly when trying to join a server,And this crash happens in the "Retrieving Server info" thing stage...