It started with me trying to use an PostScript Type 1 version of Helevetica Neue in place of the OS X version of Helvetica Neue. I won’t get into why I was doing this, but it’s a common problem that a lot of people have dealt with for years. Part of that process involves removing the Mac Helvetica from a couple of System folders, one of which is buried very deeply in folder after folder after folder.
The good news is that I was able to use the version of Helvetica Neue I wanted without too much trouble.
Then things got weird.