Last June, Apple announced that it would add support for external GPUs to macOS. And now, a little less than a year later, official support arrived. With the latest update of macOS High Sierra, you can connect a series of different graphics cards to the Mac through a Thunderbolt 3 port and use that extra power to accelerate the most demanding processes, including games and video editing. Apple has specifically highlighted its use for virtual reality.
This probably should not surprise anyone, since we are talking about Apple here, but there are several limitations as to what you can do with external GPUs. On the one hand, only the selected models are officially compatible. And, surprise, Apple is just backing some of the AMD Radeon cards, which it already includes on certain Macs. That does not mean strictly that a GeForce card will not work (people have got something to work with while the feature was in beta), but it means that you are playing a little if it will continue to work.
There are a number of limitations
Nor can you use external GPUs in Windows through Boot Camp. And just because you have an external GPU connected to your computer when it's running, macOS does not mean you're going to be doing something, either; the developers have to enable support for it. Finally, you'll also need to have a sufficiently new Mac, since external GPUs depend on the super-fast speeds provided by Thunderbolt 3. That includes MacBook Pros 2016 and 2017, iMacs 2017 and iMac Pro.
Still, if you have a newer machine and are using applications that support it, this is a great addition to the feature and a very surprising one from Apple, since external GPUs have become popular through the gaming community, which has not It exists on the Mac. One of the great benefits of including Thunderbolt 3 ports is to allow this kind of powerful flexibility. And now, for those who are willing to spend several hundred dollars extra, they can get a computer even more capable than the one they bought; That could be particularly useful for people with MacBook Pro who want a lighter package on the road and more energy when they connect at home or in the office.