Reviving an old thread... any new or more recent info on this subject (Parallels 12 and Fedora 23/24)? I've also just updated to Parallels 12 (from 10), and still running Fedora 22 (which is working just fine under 12).
A question to OP (Mark): you mentioned that "Documentation for Desktop 12 (was hard to find too) says that Fedora 23 and 24 are supported". Where did you find this, online or somewhere else?
This support page (titled "Parallels Desktop 12 for Mac System Requirements") only mentions Fedora versions 19 to 22:
kb.parallels.com/eu/123893
Last edited: Oct 27, 2016