Hi — I have a new iMac running High Sierra and I want to load it with the entire contents of my vintage 2009 MacBook Pro, from a Time Machine backup. But NOT from the latest backup; I want to select an earlier one from maybe a year ago, because I think the MacBook is infected with malware. Migration Assistant doesn't seem to give me an option to do this. And when I launch TM on the new Mac, it doesn't see my old backups, even though they are visible on the TM drive. How? Thanks!