Time Machine works best when you use it as it's designed: You simply let it run in the background and do its thing, only bothering it when you have to go back and get an old version of a document out. But if you ever want to do anything a little crazy with Time Machine ("adopting" a backup history on a migrated machine, for instance) it can be a little cranky.
For those situations, says researcher Simon Heimlicher, there's a cool little Terminal command called "tmutil." The command, which was introduced in OS X 10.7 Lion, allows you to r
