Addons unusable (they don't show up in-game)

[druedan]

So I recently downloaded a bunch of addons (sb3, CAP, wire, etc) via svn. I followed advice and made sure that all of the info.txts were renamed addon.txt if they weren't already, but when I start a game, they don't show up in the menu (i.e there's no 'Wire' tab in the q-menu) and I can't access any of the sb3 or CAP models, entities, etc.

I always installed my addons this way in gmod 12 (as did most people, I guess) and had no issues.

I'm running Mountain Lion 10.8.2 on a Macbook Pro.

Any ideas?