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I can verify that an M1-M3 Mac running Sonoma (14.1.1) the U3224KB supports 6144 x 3456 at 30bit (60Hz). Under Ventura this did not work. Seems fixed now.

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I got 6144x3456@60 on my m2 studio ultra from the day it (studio) arrived, back in... I want to say July (so not running sonoma)

Yes, 6144x3456@60 was working, but not at 30bit, only 24bit. Sonoma fixes that part (for me)

What is an “M1-M3 Mac”?

A Mac which has the M1, M2, or M3 chips.

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