Hot answers tagged resolution
I had the same issue with Windows 7 guest on a MBP 2013 retina display. It was solved for me by unticking the "Automatically adjust user interface size in Windows" checkbox.
After some digging, I finally found a solution : Update to Yosemite. Apply a patch to IOKit.framework : https://github.com/Floris497/mac-pixel-clock-patch Enjoy 2560x1080 50Hz using HDMI cable
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