I'm trying to migrate information from my MBA 13" 10.8.2 to my 15" rMBP. Method: Time Machine backup with external HD. HD is new and formatted for Mac Journaled. Attempts so far: 1. Back up from welcome, assistant unable to find my HD. I proceeded to install without migrating. 2. Opened migration assistant when logged into my rMBP. Still unable to locate my external hard drive. The HD is visible in finder. 3. Upgraded rMBP to 10.8.2 to be consistent with my MBA 10.8.2. Still unable to locate external HD in migration assistant. Keeps on searching/spinning. 4. Booted into recovery mode. From there "Restore from Time Machine back up". HD finally shows up. I selected my backup partition and it says there are "No Available OS X Back Up". Odd. So I reconnected my HD to my MBA and did a clean backup, took 2 hours. 5. Same as attempt 4. Recovery mode. Again, No Available OS X Back Up. Is there something I'm doing wrong? I'm wondering why Migration Assistant can't find my hard drive and it can only find it when in recovery mode. Yet, in recovery mode, I get an error stating that no OS X Back Ups were found. If anyone has any suggestions please let me know.