Unable to set the resolution of the screen for an external monitor

I'm trying to set up an external monitor to Asus to mirror my iMac 27 "new using a HDMI > Lightening connection, but using the monitor preferences, requires both screens at the same resolution. The Asus monitor is smaller, I'm looking for mirror to a proper resolution to the screen (that I can actually read!). From what I gleaned on the web until now, so it should be easy - and now I think it has to do with the HDMI connection on the monitor. Any advice would be much appreciated!

Tom Kloster

Portland, Oregon

You will need to disable mirroring.

Tags: Mac

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