Apple has signed a driver for AMD or Nvidia eGPUs connected to Apple Silicon but there are some big caveats, and it won’t improve your graphics. Here’s what they’re for.

An earlier time when you could use eGPUs with Macs

An earlier time when you could use eGPUs with Macs
When Apple announced the use of eGPUs with AMD Radeon cards in 2016, we were pretty excited. Full support shipped in early 2017 and for a few short years, Thunderbolt provided an excellent graphics-accelerating one-cable dock to our MacBook Pros.
But even then, Apple has stubbornly prevented modern Nvidia GPUs from working with Macs. And, with the change to Apple Silicon, Apple effectively killed off any real use of an externally usable Nvidia GPU with its Mac lineup.