MacBook Pro connected to eGPU doesn't report correct external GPU

[TimvanScherpenzeel]

User report:

MacBook Pro reports eGPU as Intel(R) Iris(TM) Graphics 550 whilst stating Chrome / Firefox is using the eGPU.

https://webglreport.com/?v=1 also reports Intel(R) Iris(TM) Graphics 550 so it might be related to Apple not reporting the correct PCI or Chrome / Firefox are not actually using the eGPU.

Should report as AMD Radeon RX 5700 XT

[puckey]

I have also had issues on MacBook Pro (16-inch, 2019) / chrome, where it would start with AMD Radeon Pro 5300M but then switch back to using Intel UHD Graphics 630, which was then unable to handle the graphics load - causing major lag. I turned detect-gpu off on mac devices for the time being for this reason..

I was also able to replicate this on versions of detect-gpu earlier than 2

[Gusted]

Not a safari expert - But I've noticed this bug on the webkit bugtracker https://bugs.webkit.org/show_bug.cgi?id=202835 which could explain why this happening.

However as puckey notes, where it would start with "AMD Radeon Pro 5300M" it actually will report the correct eGPU? In that case my best guess is that MacOS is deciding(after sampling the first time with eGPU) that this relatively low on GPU shader can be handled by a less power hungry UHD even tough that powerPreference is being set to high-power on non-safari12.