Macbooks have had Thunderbolt 3 (the protocol) over USB-C (the physical form factor) since about 2015. The Thunderbolt 3 protocol became incorporated into the USB 4 standard in 2019 (and is implemented on the physical USB-C port).

Earlier versions of Thunderbolt were proprietary standards jointly controlled by Apple and Intel, but implemented over Mini-DisplayPort connectors. They were phased out in new devices starting in around 2015.