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Discussion in 'iMac' started by kat.hayes, Jun 2, 2017.
How can you tell the difference between Thunderbolt 2 and Thunderbolt 3 cables?
The connectors are completely different. Google led me to this thread that has a good photo: https://forums.macrumors.com/threads/thunderbolt-2-to-thunderbolt-3-adapter.2009032/
The black cable is Thunderbolt 3.
Thunderbolt 2 uses a mini-DisplayPort physical connector whereas Thunderbolt 3 uses a USB-C physical connector.