The monitor OSD (On Screen Display) Display Settings Aspect Ratio should be set to Wide 16:9. The bottom Resolution and Maximum Resolution as 1920x1080 60Hz. If the left Resolution is not correct, this is an Apple graphics display issue. Unfortunately, Dell does not test/validate most of our monitor models on Apple proprietary hardware, ports, and software. For Apple display settings, you should post on the Apple Discussions Forum.
DELL-Chris M
Community Manager
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December 15th, 2015 08:00
The monitor OSD (On Screen Display) Display Settings Aspect Ratio should be set to Wide 16:9. The bottom Resolution and Maximum Resolution as 1920x1080 60Hz. If the left Resolution is not correct, this is an Apple graphics display issue. Unfortunately, Dell does not test/validate most of our monitor models on Apple proprietary hardware, ports, and software. For Apple display settings, you should post on the Apple Discussions Forum.