Apple details external GPU support now available in macOS 10.13.4 High Sierra, recommends a number of specific enclosures and AMD cards; no Nvidia cards listed
Context & Ripple Effects
This is the payoff to a setup that began when Federighi announced a Thunderbolt 3 GPU enclosure bundled with an AMD Radeon RX 580 alongside SteamVR coming to the Mac in mid-2017. With macOS 10.13.4, Apple turns that experiment into official policy: a published list of supported enclosures and cards.
The list is telling — every recommendation is AMD, and no Nvidia card appears anywhere. Ars Technica's subsequent review found the gains real but narrow, decent especially under Metal but confined to Thunderbolt 3 machines and AMD silicon, which frames exactly how far Apple is willing to open the Mac.
First-order effects
- Mac owners with Thunderbolt 3 machines can now buy against an Apple-sanctioned list of enclosures and AMD cards rather than gambling on unofficial drivers; anyone holding an Nvidia card for Mac use is formally locked out.
Second-order effects
- AMD becomes the de facto external-GPU vendor for the Mac, and partners race to productize it — Apple followed within months with the $699 Blackmagic-built Radeon Pro 580 eGPU — while Nvidia's exclusion pushes CUDA-dependent pros toward Windows workstations.
Third-order effects
- Curating the GPU list around Metal and AMD was a step toward Apple owning the whole graphics stack; the endpoint shows up years later, when eGPUs return to Apple Silicon only via a Tiny Corp driver signed for AI research compute — not for accelerating graphics at all.
The trend: Apple has moved from curating third-party GPUs to replacing them with its own silicon, leaving external GPUs a niche compute accessory rather than a mainstream Mac upgrade path.