There is a question that no one answer before, which I think is very important for a lot of people.
I have a MacBook Pro retina 2013 with thunderbolt 1 connection, and I want to use eGPU.
As it says in apple, the adapter from thunderbolt 3 to thunderbolt 2 (and 1, too), is bidirectional, see here:https://support.apple.com/en-us/HT207266
So, theorically, we could use a thunderbolt 3 eGPU case device in a thunderbolt 2 or 1 Notebook with the adapter, as it matches de specifications of the previous apple support page. Obviously not as fast as the TB3 specs.
Can anyone try their eGPU cases in a MacBook Pro with TB2/1?
I am really interested, as I could buy it knowing that I am investing for a future notebook upgrade.