Eric converted to High Sierra on his Mac and chose APFS on Time Machine. Now he's got trouble. Leo says that Apple cautioned not to do that. Can he at least downgrade? Leo says that the good news is there was no data lost, so he could format it to downgrade from APFS and then let it backup again. Eric should check out this article at macobserver on how to use Time Machine with APFS. He shouldn't convert to APFS if he has a Fusion drive just yet.
Justin is buying a new 5K iMac. How does he migrate his old data into his new machine? Leo says that there is a migration tool built into the iMac to move it over, but if he doesn't want to move all of it, the migration tool will allow him to move just the apps. He should let it do that because it'll do a better job.