Tried using the tips from @Snowghty to no avail. When I load the x-force file and press Enter, ups shows that nothing has been unpacked. I can't figure this out to save my life. Getting this thing to work is the last thing needed to retire my MacBook Pro from 2009 (yes, it's that old) to my new one. The keygen I have is for an older macOS. No idea where to find a more current one.