Modified itemtype works for Mac. As well as edited minimaps. Right click on Conquer app, go to "Show package contents" and from there the folder structure is quite similar to the one on Windows client. Replace the edited file as instructed.
As for bots or other "helper" programs, none.
With the encryption change it's very difficult to see any workable hacks for mac being viable any time soon.
If the encryption HADN'T changed you could have just routed your mac client through a proxy hosted on a windows machine (vps or w/e). Would have worked fantastically (would have limited the issue to trying to edit the server/dat or writing a mac compatible conquerloader