Dissconnect - Server uses different class tables

Hi there, I’m running gmod in dev mode and when joining any server incluiding my own I get this:

http://puu.sh/6BvMm.png

I pressume it’s because of Dev/Main branch issues but I have no idea. I’m also on mac so perhaps that’s an issue?

The Dev branch has newer engine version, you’ll have to get out of Dev beta, or update the server with beta.

I’m pretty sure last I checked main branch on mac wasn’t running properly but I gues I have no choice ;_;