Originally published at: https://tidbits.com/2019/10/22/tipbits-how-to-mirror-selected-screens-in-a-multiple-monitor-setup/
Have you ever found yourself in a situation where you have three or more screens attached to a Mac, and you want to mirror some combination of them? It turns out that macOS makes that possible. Read on for the trick to achieve it.
This is fantastic… works a treat on my two NEC 24" monitors which are attached to my 27" iMac. I’ll have to see about getting it to work with my MBPro and the College’s iMac and projector setup… hmm…
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The vague mention of Sal’s great idea should be outlawed by the Geneva Conventions.