Hey everyone! Bumping this as I’m having almost the exact same issue. Old Media100 Files, from the year 2000. Backed-up from a Mac in 2000, and now trying to open on a Mac running the most recent version of Media100 on a Mojave 2014 Mac.
Was there ever a stream-lined solution discovered to enable these older Media100 files to be opened? The above solution regarding forked data is totally over my head 🙁
You can see in Finder, the files preview icon has not updated… they seem completely unreadable.