Hi JC50,
Presently, there is no Microsoft Project for Mac version, and there is also no Official information about it. For the newest information about Microsoft Office for Mac, you can refer to http://www.microsoft.com/mac.
In addition, based on my search, as an alternative, you can refer to Bob's reply in http://answers.microsoft.com/en-us/mac/forum/macoffice2011-macother/is-there-a-version-of-project-for-mac/4284bc3e-1765-439a-9ac1-f373e0e0ee78?msgId=458f4639-fb38-4d88-a443-1b1f3e3b18e8.
Thanks,
Eben Liu