Time Machine

Whoa. I just got a glimpse of what Time Machine for Mac does. I thought it was just a backup/restore thing. It goes beyond that. You get complete control over the state of your computer in the past. You can pull old files or find stuff that might have been altered or deleted just by flipping through the various backups that have taken place over time.

Very very cool.

From Apple

Time Machine. A giant leap backwards.
More than a mere backup, Time Machine makes an up-to-date copy of everything on your Mac — digital photos, music, movies, TV shows, and documents — so you can go back in time to recover anything.

You can start using Time Machine in seconds. The first time you attach an external drive to your Mac, Time Machine asks if you'd like to use that drive as your backup. Say yes and Time Machine takes care of everything else. Automatically. In the background. You'll never have to worry about backing up again.

Back up everything. Time Machine keeps an up-to-date copy of everything on your Mac. That includes system files, applications, accounts, preferences, music, photos, movies, and documents. But what makes Time Machine different from other backup applications is that it not only keeps a spare copy of every file, it remembers how your system looked on any given day — so you can revisit your Mac as it appeared in the past.

Enter the Time Machine browser in search of your long-lost files and you see exactly how your computer looked on the dates you're browsing. Select a specific date, let Time Machine find your most recent changes, or do a Spotlight search to find exactly what you're looking for. Once you do, click Restore and Time Machine brings it back to the present. Time Machine restores individual files, complete folders, or your entire computer — putting everything back the way it was and where it should be.