Can't find where Mountain Lion stored my iPhone backup.

Checked the path described below but could not find any MobileSync directory on my iMac. I have OSX 10.8.2. Have 2 iPhone 5's, 1 iPad, and 1 iPod sync'd via iTunes. I need to sync all iDevices to a new iMac. Thanks for your help.

Where iTunes backups are stored on your computer

The folder where your backup data are stored varies depending on the computer's operating system. Make sure the backup folder is included in your periodic data-backup routine.

iTunes places the backup files in the following places:

Mac: ~/Library/Application Support/MobileSync/Backup/