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Dual Display Problem

I am using a 2017 iMac with OS 13.6.9. Using an outboard display with this computer, in dual-display mode, when I turn the outboard display off, the brightness of the iMac display often (not always though) goes to maximum brightness, even when I have set the brightness of this display to a lower level. Is this an inherent bug or can I fix it somehow?

Posted on Sep 18, 2024 1:27 PM

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Dual Display Problem

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