Skrewy fonts on G13


I’m testing Garry’s Mod on my Mac, and everything works great really. Except of the text.
In chat, in-game editors (like E2), scoreboard and other places where text is printed. Seems like there’s some kind of font/text bug.
Where the spaces are very unclear and letters overlap each others and so on. Is this is a known bug?

I doubt its THIS mac, as I tested it on my other Mac too and exactly the same happened.
It’s anyway really annoying and hard to read text, so I’m searching help here to know if this is a bug, setting or something I can do about it?