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Folks with more coding knowledge than I have (and a greater willingness to potentially brick a $2,400 machine) have been hooking up external graphics cards to Macs for years, but the support now come bundled into macOS 10.13.4 High Sierra. In layman’s terms, Apple officially supports some graphics cards that you’d normally only find in a bulky PC tower—so long as you have a separate external chassis to stick them in and a Mac with Thunderbolt 3.

I hoped eGPU support would be revolutionary. Beyond that, I hoped it’d allow me to break with PCs entirely, as I really only use them for gaming these days. Anyone who watches knows I’ve been a little frustrated with the current state of Mac gaming, and an external graphics card struck me as an easy way to circumvent the limitations of Apple’s built-in processors.

In some ways, it is. On the I took an AMD Radeon RX 580 graphics card and slipped it in a spare eGPU chassis loaned from the folks at PCWorld, and I watched in awe as the recently released port of Rise of the Tomb Raider suddenly looked the way it was supposed to on my 2017 15-inch MacBook Pro. Once everything was on the table, setup only took around five minutes. Leif Johnson/IDG Honestly, putting the graphics card in the chassis was the most difficult part of the process, and that took maybe three minutes.

That’s the abridged version. Yes, it works. Though in practice, eGPU support is currently little more than an expensive novelty. Stay within the lines Let’s focus on the best part first.

Once I slipped my Radeon RX 580 into an chassis and tightened the screws, all I really needed to do was plug the Thunderbolt 3 cable into my MacBook Pro. Within seconds, an icon resembling a processor popped up on the Mac's top menu bar, showing that the Radeon RX 580 was, in fact, working. (Getting it to work with games takes a few more steps, but more on that later.) Even better, I didn’t even have to restart.

Apple prides itself on elegant simplicity, and in this case Steve Jobs' favorite old saying remains true: It just works. Leif Johnson/IDG It's really no different from disconnecting a drive. It works, that is, so long as you have the right materials. You can only pull this off without any technical trickery so long as you're using a MacBook or iMac with Thunderbolt 3 support, which means you're limited to using laptops dating from 2016 and iMacs dating from mid-2017. This is a bit of a bummer, but Thunderbolt 3 supports data transfers of up to 40Gbps, while Thunderbolt 2 supports 20Gbps. Unfortunately, that limitation likely knocks a lot of users out of the game right there. For those of you who can play with that kind of power, though, let’s move on to the supported cards.

Here you’ll find your gaming ambitions further thwarted by Apple’s lack of direct support for Nvidia cards. It makes some sense considering that AMD makes most of the graphics cards found in contemporary Macs, but it’s another low blow in a gaming environment where Nvidia cards win mountains of accolades. If you’re wondering, I tried using Nvidia cards, but there's no built-in driver support. I plopped an Nvidia GeForce GTX 1060 into the eGPU chassis, connected it, booted, and nada.

The little processor icon didn't show up. It just didn't work. I also tried using Nvidia's that's partially designed with macOS in mind, thinking I'd hit on a way to make it work. The Nvidia toolbar icon showed up, but the card itself never worked. Perhaps a different chassis would have helped.