Here are the steps I took for migrating from a early-2013 MacBook Pro Retina 15-inch to a late-2013 one.
- Disconnected from the Internet (at least it will simplify
- Updated my TimeMachine (TM) backup ("Back Up Now" on the status bar)
- Disconnected my TM hard drive and connected it to the new Mac
- Turned off the TM backup and Backblaze from the old machine
- Connected the TM backup disk to the new Mac
- Selected the TM restore process on the install process, but it never showed up, so I restarted it with the 'option' key down and selected the TM code, entered its password and continued with the installer from there
- Waited about 3 hours till the data transfer (about 200GB from a stock external drive) was done
- Logged in my account