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I just got a UHD TV and I am trying to get 4K r...

I just got a UHD TV and I am trying to get 4K resolution via Thunderbolt to HDMI from my iMac 5K (mid 2015) but can only get mirrored 1080p) The strangest thing is that a couple of minutes ago I was using it as a separate display with the UHD TV in 1080p and the iMac display independently at 5K. I don't really know where the difference happened. Is it not possible to drive each display in their native format? Am I stuck in 1080p land if I use the UHD TV? or is there a different way to interconnect, maybe from the iMac USB2 to HDMI2? The UHD does support HDMI 2.

Does anything in this link help?

Using 4K displays, 5K displays, and Ultra HD TVs with your Mac - Apple Support

最後更新：2017-10-07 12:42:36

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