I have a Time Machine backup of my system from last week right before I installed Mavericks. I've determined that Mavericks breaks too many programs that I need to use and doesn't add enough features (yet) for me to want to be using it, so I want to roll back to Mountain Lion.
BUT… (there's always a but, right? I suppose if there weren't, I wouldn't be asking here) here's the catch:
I haven't plugged in my Time Machine drive since upgrading. I have saved documents in the past week. If I were to just roll back to last week's backup, I'd lose all the work I've done since upgrading.
Can I safely run a Time Machine backup under Mavericks, revert to last week's backup, and then restore individual files from the Mavericks backup? Do I need to be buying another external drive to first back up this week's system, then restore last week's system, then pull files? What needs to happen here to restore my system to ML without losing a week's work?