OmniCC just isn't working for me. I have deleted and re-installed 3 times in the last month. The cd timers aren't there and the addon doesn't even show up in the Addon section of Interface. I have a Mac; I don't know if that makes a difference.

If it doe snot show up, it's simple: you are not installing it correctly. If you're using a client, I advice you to try it manually.