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According to the Apple tech specs page: No. One external up to 6K 60Hz. But, I believe you can connect a second external and it will mirror the other. This is a limitation of the M1.

If you need three displays, get a MBP (M1 Max) or a Mac Studio.
 
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can m1 iMac support 2 4k external displays without any adapter?
An M1 Mac can drive a total of 2 displays, so the Mini can run 2 4k displays. Laptops and the M1 iMac require the use of a Displaylink adapter to drive 2 external displays because you’re then at 3 displays.
 
An M1 Mac can drive a total of 2 displays, so the Mini can run 2 4k displays. Laptops and the M1 iMac require the use of a Displaylink adapter to drive 2 external displays because you’re then at 3 displays.
thanks!
 
Laptops and the M1 iMac require the use of a Displaylink adapter to drive 2 external displays because you’re then at 3 displays.
DisplayLink would, of course, not be a supported solution. Can you recommend a DisplayLink adapter and software which you know to work well with an M1 Mac?
 
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