I had a MacBook Pro 2017, using a USB-C to HDMI which can support 4K@60Hz.

I ran CoreDisplay patcher to enable 60Hz for 4K resolution:

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But Refresh Rate is still locked at 30Hz for other resolutions. Is there a way to unlock 60Hz for 2560x1440?

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  • Note: I also tried SwitchResX, but there is no detected HiDpi scaled resolution for 2560x1440 @ 60Hz. There is a non-HiDpi 2560x1440 @ 60Hz but the text is blurry on my 4K monitor – Dio Phung Sep 11 '17 at 0:36
  • 2560x1440 will always be blurry on a display with a native 4K resolution. HiDPI means 1920 x 1080 @'2x (HiDPI) = 3840 x 2160 @'1x = 1280 x 720 @'3x (HiDPI). ## You will not be able to chose 2560 x 1440 with this display as this is a physical limitation. For this you need a display with a native resolution of 5120 x 2880. – oa- Sep 18 '17 at 9:24
  • @oa: With the same monitor (QNIX 32", 4K 3840x2160), I was able to have scaled 2560x1440 @ 60Hz using HDMI 2.0 on MacBook Pro 2014 (without Touchbar). Note that my current MacBook Pro 2017 CAN output to this monitor at a scaled 2560x1440 resolution but refresh rate is limited at 30Hz. I'm using this adapter which support 4K@60Hz goo.gl/2YNEyf, – Dio Phung Sep 18 '17 at 22:05
  • Scaled resolution @60Hz on HDMI 2.0 is a big headache. I switched to use USB-C to DisplayPort and voila, it works beautifully: imgur.com/a/p4JdC 2560x1440 HiDPI at 60Hz – Dio Phung Sep 25 '17 at 23:05
  • Found out my monitor QNIX 32" have a mix of both HDMI 1.1 and 2.0. Be sure to use HDMI 2.0 to achieve 60Hz at 4K – Dio Phung Jul 22 '18 at 0:41

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