You should be able to connect Thunderbolt 2 devices to a Thunderbolt 3 Mac with the Apple Thunderbolt 3 to Thunderbolt 2 Adapter (if they are self powered).
It may be helpful to name the specific model of hard drive you wish to use and to describe the alternatives that failed.
- Answered by Joseph V from Fort Langley
- 10 Jan 2019
- Flag as inappropriate Answer (Will these work connecting my Thunderbolt 2 hard drives (LaCie) to my 2017 iMac?)