help with 4k@60hz in high sierra 10.3 w/ Nvidia pascal

[thegerman1220]

here's how i got passed 30hz in 4k on my Sierra hackintosh.

tl;dr - I upgraded the firmware on my CAC-1070 DP/HDMI converter, installed switchresx, defined a custom resolution @ 60hz, then (most importantly) turned my 4k screen off and on

my setup:
hackintosh Sierra 10.12.6
geforce gtx 1070 - most updated web drivers (378.05.05.25f04)
primary display - Sceptre U425CV-UMC (budget 4k), connected via CAC-1070 DP/HDMI adapter
secondary display - Lenovo LI2364D, connected via HDMI


so I've been struggling getting 2560x1440 @ 60hz. Everythime i tried anything over 1080, my main screen would generally just go blank and become unusable even after reboots. i'd have to wipe display plists and/or shuffle around hdmi connectors & ports on the back of the computer. It worked fine in Windows, so it just didn't make any sense why it didn't on my mac install.....

After much frustration, trial and error, this is what finally worked for me

0. modify SMBIOS to have the OS (snowflake warning) self-identify as an iMac17,1 (not sure if this step is even necessary)

1. upgraded the firmware on the cac-1070 connector. follow instructions here
http://insights.club-3d.com/thread/cac-1070-firmware-download/

2. install switchresx; do not reboot. load up a custom resolution of 3840x2160 using the 'simplified settings' of CVT-RB. if the scan rate doesn't auto-populate, manually enter 60hz. save settings. reboot.

3. so after this reboot, my primary display went completely dark and the OS didn't even recognize it. the simplest yet most important step comes here. turn off / turn on the display. it was recognized by the OS at the default 4k / 30hz, so i then switched to the 4k/60hz custom setting in switchresx. from there i repeated step 2 to implement 2560x1440 @ 60hz.

4. Done, son.

so now, the only thing that's a bit annoying is that i have to turn off / turn on the display every time i boot into the hackintosh. The OS still has a hard time seeing the 4k display even from a cold boot. a little strange but at this point, i'll take it.

anyway, hope this helps others who have been struggling with the same....now if you'll excuse me, i'm leaving to bask in the 4k/60hz glory....

 

[svbailey]

I use this adapter instead of the Club3D one:https://www.amazon.com/gp/product/B00S0C7QO8/?tag=tonymacx86com-20
I didn't have to use SwitchResX and it boots my 4k screen at 60hz off the adapter without any additional software. Works like a charm!

 

[minir4]

Sorry for not replying to the one guy who could not get his adapter to work, I didn't have to do anything, it just worked out of the box but with problems but I didn't and don't want to use an adapter, so I returned it.

I am wondering since it has been a while, if anyone has any updates on this? Like if with newer versions of macOS are able to get this working or something? as I have not updated mine for a little while now. Is it at all possible to get 4k running at 60hz from an HDMI 2.0 port? (not display port) with an Nvidia 1060? or any Nvidia card?

 

[CrashMidnick]

I am wondering since it has been a while, if anyone has any updates on this? Like if with newer versions of macOS are able to get this working or something? as I have not updated mine for a little while now. Is it at all possible to get 4k running at 60hz from an HDMI 2.0 port? (not display port) with an Nvidia 1060? or any Nvidia card?

Working HDMI 4k@60hz on my main system :

MacOS 10.13.4 + GTX 1070 Gaming X + latest web drivers + SMBIOS 18,3 + 4K monitor Samsung U32H850UMU (2.0 HDMI CABLE) over the 60hz HDMI port (there are 2 HDMI ports on this monitor, one is only 30hz, the other one 30/60hz).