For us 2015 and older iMacs, if you want to buy an external TB3 SSD that comes with supplied TB3 cable and use it on your TB2 iMac. I was unable to find the Male TB2 / Female TB3 adapters. There are plenty of adaptors going the other way TB2 Female / TB3 Male.
Is there a reason or is it just to soon?
Is there a reason or is it just to soon?