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people have gotten this to work (for a sufficiently sketchy definition of work) for linux run in QEMU at least.

https://scottjg.com/posts/2026-05-05-egpu-mac-gaming/

in particular, the conclusion of that article is "You can run cyberpunk 2077 on a M4 macbook air w/ a 5090 eGPU".

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That looks completely esoteric, incredible stuff.
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It’s surprisingly good to do with full screen and the Apple hvm is very nice. Don’t let the experimental tag scare you.
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Are you able to play Steam games?
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never tried so I don't know. it's easy for you to fire it up and try though
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posted as a sibling to your comment, but you'd likely be interested in

https://scottjg.com/posts/2026-05-05-egpu-mac-gaming/

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