The new release of macOS, identified by version number 10.13.4, introduces support for external GPUs. It is only possible to use this function on Macs that have a Thunderbolt 3.
In addition to the release notes of the new version, Apple has a separate page about the external gpu’s published. It has been mentioned that the support is present on MacBook Pros that came out in 2016 and later, as in iMacs and Pro variants from 2017 and later. Apple also writes that it is possible to connect multiple GPUs in this way, with a direct connection yielding the best performance.
The company has published a list of ‘recommended’ gpu’s with only AMD copies. For example the Radeon RX 570 and 580, just like the RX Vega 56 GPU. In addition to the cards, Apple also mentions recommended enclosures that provide sufficient power for the card itself and at the same time to charge a MacBook Pro.
Not all applications support acceleration using an external GPU, Apple said. This is intended to speed up applications with Metal, OpenGL and OpenCL. A page for developers has been created where more information can be found. Also, the use of such a gpu does not work via Windows in Boot Camp. The new version of macOS brings several other changes, including security updates .