I got a new machine in the past week and found that I had a number of fonts on the old machine that aren't on the new one. They could have come from previous versions of MS Office or other apps. Anyway, I exported all of the installed fonts (2.5 gb worth !!) and have a copy of them on the new machine - but not installed at this point. Reason is, each one that I try, after confirming they don't already exist on the new machine, gives an error in Font Book: 1 serious error was found. Do not use this font. This has happened with each font that I've tried. With one, I simply ignored the error and installed it anyway to see what would happen. In that case, it simply doesn't show up, as if the OS ignored the override to install it anyway. It doesn't matter if I tell Font Book to install them for "User" or "Computer" either. How do I get these on the new machine ?