MostOfMyMac.com

Back to My Mac is a feature in Mac OS X v10.5 and later that makes it easy to automatically connect to your other computers over the Internet. Once you’ve signed into MobileMe on your computer and enabled Back to My Mac, you may securely reach other computers via the Internet. The other computer(s) also must be signed into the same MobileMe account, be using Mac OS X v10.5 or later, and have Back to My Mac enabled on them. After completing a new installation of Mac OS X v10.5 or later, Back to My Mac is enabled by default, however, the computer cannot be reached until sharing services (such as File Sharing or Screen Sharing) have been enabled in Sharing preferences (in System Preferences).