So this is very exciting. I know this was done out of necessity due to Apple depreciating OpenGL support in 10.14 and that obviously takes priority... But generally speaking, native Vulkan support comes with a performance boost that'd definitely be appreciated for all ESO players.

This is also very exciting as an AMD user on Linux that runs the game via Proton/DXVK. It's always preferable to have a native client than to run it through DXVK compatibility layers which I was doing even on Windows for superior anti-aliasing.

Mac Min Spec
We have switched the Mac renderer from OpenGL to MoltenVK (Metal) to support the upcoming release of the upcoming MacOS Mojave. Upon first launching the game, you will notice longer load times and frequent hitching as the shaders are rebuilt for MoltenVK, with some notable unstableness in this first PTS patch. We plan to make iterations throughout PTS to improve performance. To support these changes, we will be updating the minimum spec for all Mac players in Update 20.

Operating System: macOS High Sierra v 10.13 Model: Late-2013 27-inch iMac and Newer Hard Disk Space: 85 GB free HDD space Internet: Internet Broadband Connection https://forums.elderscrollsonline.com/en/discussion/435633/pts-patch-notes-v4-2-0#latest

Background information on MoltenVK https://github.com/KhronosGroup/MoltenVK

Given Bethesda's AMD partnership that extends across all of their projects, I'm expecting some pretty substantial optimizations that benefit all hardware in the near future. Elder Scrolls Online is currently heavily CPU-bound and CPU bottlenecked but I'd expect a performance increase as we've seen with most other games that are similarly bottlenecked. Some DirectX vs Vulkan benchmarks have shown anywhere from five percent increase to twice the frame rate.

Hopefully we get ZOS to comment on the subject soon.