I’m on Big Sur. on a 2014 mini with a rx 5500 xt eGPU. Same issue, I think. Frame rate in high single digits. Almost certainly using the integrated graphics for the heavy lifting instead of the eGPU.
I moved the metal version of the application out of the way and was able to run what I’ll call “Zwift Classic” to at least have a useable game.
ZwiftMetal lives in ~Library/Application Support/Zwift
Chiming in on the metal support.
I’m running a 2014 Mac mini with an eGPU. Today, I suddenly had single-digit fps. I found that I was running the metal version of Zwift. I strongly suspect that it was using the integrated gpu for the heavy lifting rather then the eGPU (radeon rx 5500 xt). I moved the metal application out of its folder and relaunched. got the “classic” version with expected fps.
Get Info on the metal app did not include the checkbox to force it to use the egpu. I was looking forward to seeing a native metal version of Zwift. But until this is fixed, it is a huge step backwards.
Hey al - thanks for flagging this up to us. We’ve been migrating Apple devices that can support the Metal graphics engine away from running OpenGL in phases. If you see the “ZwiftAppMetal” on your Macs - this is why.
That said - we have not yet built in support for external GPU’s, but it’s on our to-do list for the next release cycle. Appreciate your patience. In the meantime, sounds like @Mark_Napier found a viable workaround.
Today’s update (1.29)… Hurray!
Tried it out in “just watching” mode.
Zwiftalizer said I was using the medium profile. In the past, it had said I was using basic.
I’d actually symlinked basic to ultra.
So I did the same for medium.
Locked in at 30 fps. So I set my screen refresh to 60. Tried again. Almost locked in at 60fps. (occasionally drops a bit from 60 – but the average was 58-59)
I’m CPU-bound on my 2014 Mac mini. The eGPU is working about as hard as an A+ racer drafting a “D” Pacebot.
This was in Watopia. We’ll see how this rig fares in Neokyo…
I am very happy with the Zwift Metal support with my eGPU (AMD RX580 on a 2017 i7 MBP) in Zwift version 1.29. Consistent 30fps with the Ultra profile and 2160 resolution looked great. Activity Monitor reported 40-60% utilization of the eGPU for most of the ride, which is lower than I expected.
I am running it at Ultra and 2160 resolution on a 2017 i7 MacBook Pro and a RX580 eGPU (Gigabyte Gaming Box branded) and still getting 60fps Max with 50 Average. The 5700XT would be more powerful, but not sure what fps you might see. When Zwift switched to Metal on macOS, I feel like both quality and stability improved. Overall I’m pretty happy with the setup, especially since it based on hardware I already had around.
Is gpu.io just a forum for asking these question too?
Yes, egpu.io has a forum plus reviews of enclosures and build reports from other users. However, it seems to be less reliable these days that it was a few years ago. AMD eGPUs are pretty much plug and play on an Intel Mac, so less of a need to make configuration changes. It was a bit of a challenge a few years ago, so the forums were helpful.