My sister is currently living overseas. Last month, her Mac was stolen. Unfortunately, she didn't have Find My Mac enabled, as she was running an older version of OS X, which didn't support it. The police did manage to recover the Mac after a few days, but this situation got me thinking... how could you track down a stolen Mac without Find My Mac enabled? Certainly, there are commercial third-party apps that could help. But, what about something a typical Mac user might have installed? What about Dropbox?