This looks like duplicate of bug 78961, however it is also reported on Intel Mac Mini, I would leave it for Colin to decide.
Darren Albers: is the traceback on Mac the same (.py filenames and line numbers)? Do you have any other operating systems installed on Mac (Windows or Mac OS X)? If the traceback is different, I would suggest that you open new bug for it. -- Herd2 installer crashes, step 6 (partman) - bug report as instructed https://launchpad.net/bugs/79005 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
