why not work together with the dude from wowaceupdater for mac? he had -the best- mac addon updater for ace addons available. with a true mac feeling! always worked, never crashed, never ever any problems. it didn't have an option for unembedded/embedded addons etc though, it was something i wished for though.
Ahh, but this was the beauty of the old system. While you thought the updater above was the best one for your mac, I myself preferred a python script to do the job (http://code.google.com/p/wowacepy/). Everyone had their own "favorite" and we all still got our addons/updates.
Heck, I even switched a lot of my addons to "Ace" equivalents simply to not have to manually update/maintain them. With the release of 3.0, I'm going to start from ground zero again, going minimal, and re-evaluate how many mods I will use that are "Ace" (aka determine how much I simply can't live without them if there isn't an alternative).
Indeed, there is a beta version of the CC client for the Mac available. Be forewarned though that this is not a "true" Mac app. Yes it runs on the Mac, but it was built using some cross platform GUI kit, and doesn't even remotely resemble a Mac app. It looked out of place on my desktop, I felt like I was running an app inside of Crossover (Wine for the Mac). I spent enough time to backup my addons, install the beta, run it, have it mess up my addons, remove it, and restore my addons. It's "hardly" production quality yet, and frankly I'm not planning on using it.
I will find a way around this, even if it includes paying for the premium service just so I can have a key that lets me use a third party updater. As at this point, anything is better than what we have been given.