Good luck, I hope you're able to resolve these issues and get Zimbra running.
However, if you try to completely uninstall the software, be aware that a couple of us Mac users have run into some system issues. Most notably, cron jobs will continue to run even if the zimbra user is deleted (these must be manually removed), CPU cycles will be eaten up by Spotlight until you manually reset the index, and your hard drive might not go sleep anymore on its own (mine doesn't).
I filed a bug on this issue (
#7793)
This thread outlines some of the problems we've been having and the response from the support staff.
I also started a
Wiki entry.
Hopefully these issues will get resolved soon.