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I just bought the LG 29UM58 21:9. My computer is a Mac Mini late 2012 (i7 model) running OS X 10.11

The display preferences just shows 1920x1080 16:9 than then is stretched out to 2560x1080 21:9.

SwitchResX software doesn't work? (Crashes? Runs but doesn't offer other resolution choices?)

I use a Thunderbolt to HDMI adapter.

How can I configure better resolution choices (ideally 2560 X 1080) for my setup?

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You'll need a 1080 capable adapter or better. See this thread for some options.

I'd get the cable matters 4K adapter over the 1080p one if you can afford the extra $4 cost.

Keep in mind HDMI spec as well for limits on resolution: Can a MacBook Air support 2560x1600 output via HDMI using a Mini DisplayPort/Thunderbolt to HMDI adaptor?

  • Comments are not for extended discussion; this conversation has been moved to chat. – bmike Aug 11 '16 at 10:38

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