I got this response from a GOG staff member after submitting a problem I was having getting the game to work:

"Mac OS X 10.9 is not supported in Total Annihilation: Commander Pack. OS X 10.9 was released after the game's initial GOG release, and we weren't able to make the game work reliably on the new system. Because of this the system requirements list OS X 10.9 as not compatible."

I know that a bunch of us have been scratching our heads about why we haven't been able to get the game to work. Well, I guess we have our answer. :(

I really hope they decide to support it. I'm very bummed out about this.

Ah, perhaps this is why whenever I try to open the game, it tells me:

"Total Annihilation Commander Pack" is damaged and can't be opened. You should move it to the Trash.

I thought maybe the download was corrupt so I downloaded it again. Same error. I really hope this gets solved. When this game went on sale, I had to grab it because I loved this game when it came out. I was really excited to play it again.

They did. If you still have the issue with the new installer then check the Support articles for Total Annihilation. There are posted workarounds.

I hope this latest update actually works. I'm just running the windows one in wine. The mac installer was a complete mess last time I tried it. I contacted support and gave a suggestion on how to make a new wrapper but I don't think the person I contacted understood what I was saying...

OK. I'll try. I generally find gog support to be super amazingly good (details to be explained in forums). I just think that there may have been a communication issue.

Awesome. Apparently the TA Mac app updated since I posted my original response. The new update works (after downloading some stuff for Wine, apparently).

Related question: The stuff that wine downloaded (mono and gecko, I believe). Where where those files put on my file system?

Hmm I still don't seem to be able to get it to work properly.

I can get it to load now but it has major flickering issues. :(

What did people do to get it to work?

http://www.gog.com/forum/total_annihilation_series/mac_version/post58

That's what I did to get it working for me.

Pretty incredible the amount of attention this gets.