Apple has updated its Using the USB-C port and adapters on your MacBook (Retina, 12-inch, Early 2015) KBase article to provide more detail about USB Target Mode. One piece of information that jumped out at me was this section:
For reference, a USB-A connector looks like this.
Based on my reading of the KBase article, you will not be able to connect a 2015 MacBook in USB Target Disk Mode to a Mac with USB 2.0 or 3.0 ports and expect to be able to transfer data via Setup Assistant or Migration Assistant to the USB 2.0/3.0-equipped Mac.
There are a couple of workarounds for this limitation:
- Cloning the MacBook’s drive to an external drive and plugging that external drive into the USB 2.0/3.0-equipped Mac.
- Creating a Time Machine backup of the MacBook’s drive and accessing the Time Machine backup on the USB 2.0/3.0-equipped Mac.
Both of these workarounds should allow the MacBook’s data to be accessible by Setup Assistant or Migration Assistant.
