Hey all, same issue as everyone else. I've tried all the solutions presented -- Firetrap's (installing brew, wine, and winetricks; reinstall and reboot), Wednesday Woe's, creating a "coh" folder in apps and ensuring my drive uses the default name, etc. No .wine directory to delete, for what it's worth.
64bit is selectable but, like everyone else, when I click the arrow I get a little checkmark, which disappears after a few seconds and then...nothing. My fan starts going crazy at that point, though, and Rum seems to be taking up between 60 and 350 %CPU...
Current situation of my apps folder: Island Rum, "coh" subfolder with the CoH client and a bunch of files (including "wine" with a 4.0.1 subfolder).
No idea what to do now