The new Type-C ports on Apples latest ranges of Mac laptops speak both Thunderbolt and USB protocols; therefore the AT2020USB+ and the AT2020USBi are both directly compatible with the Thunderbolt 3 port and the USB-C ports. To make this work you will need to purchase a USB-C to USB-A adapter, as the microphones are only provided with USB-A cables.
To guarantee compatibility, we would recommend purchasing Apple's adapter, which can be purchased directly from Apple here.