Home › Forums › CAC-1170: 4k 60Hz Finally working with 2014 15″ Retina Macbook Pro and Vizio M50-C1 › RE: CAC-1170: 4k 60Hz Finally working with 2014 15″ Retina Macbook Pro and Vizio M50-C1
Step 2: Once the firmware is the ps176b0_0x07.0x00.0x23 version, install SwitchResX on Mac OS X (http://www.madrau.com).
1. Follow instructions to disable System Integrity Protection (SIP) so that u can install a custom resolution.
2. Create a custom resolution of 3840 x 2160 at 60 Hz using the Preset “CVT-RB” and simply putting the vertical “scan rate” as 60 hz.
3. Save this custom resolution
4. Restart computer to install custom resolution