TechProgenitor
commented
7 months ago Hi @qinjingliuan, Are you using macOS Ventura or Sonoma? I'm using Ventura and also recently managed to upgrade my internal display from the stock to a B173ZAN06.C which is a MiniLED 4K-144HZ display. Hilariously enough I can get it up to 4K-144HZ in Windows and Ubuntu but can only get it up to 4K-120HZ in Ventura. (Hoping that this is just due to broken DSC support in Ventura.)
Anyways, @kingo132 pretty much laid out how to increase the refresh rate in Windows. Essentially you're modifying your original EDID data with a specialized tool within Windows called CRU. It's similar to SwitchResX, and you can export the newly modified EDID afterwards. Afterwards, what I did is took the modified EDID and made a codeless kext with it for macOS. I see now that you've mentioned it that Windows says my bit depth is 6-bits when increasing the refresh rate to 144HZ. Might explain why the colors look way better in macOS than in Windows and Ubuntu. (How do I check the internal display's bit depth within macOS?)
To make this codeless kext within macOS, you use a utility called Hackintool:
- Go to the "Displays" tab
- Click the export button at the bottom right
- (it looks like a rectangle with a right arrow coming out)
- You'll find a file on your desktop called Display-xxx-xxxx.kext.
To edit the codeless kext with your modified EDID data:
- Right click on the kext file, and click "Show Package Contents"
- Go into the contents folder and you'll see an Info.plist file.
- Edit the Info.plist of the extracted kext file by replacing the IODisplayEDID data.
- You'll replace that data with the modified EDID data from Windows.
To add the codeless kext to your configuration and get 4K-120HZ:
- Put the newly created codeless kext in EFI/OC/Kexts
- Edit your config.plist file by adding the codeless kext to your configuration.
- In order to do this, add the following to your config.plist under Root/Kernel/Add:
- (replace Display-xxx-xxxx.kext with your information)
<dict>
<key>Arch</key>
<string>Any</string>
<key>BundlePath</key>
<string>Display-xxx-xxxx.kext</string>
<key>Comment</key>
<string></string>
<key>Enabled</key>
<true/>
<key>ExecutablePath</key>
<string></string>
<key>MaxKernel</key>
<string></string>
<key>MinKernel</key>
<string></string>
<key>PlistPath</key>
<string>Contents/Info.plist</string>
</dict>
qinjingliuan
kingo132
Hello, I recently replaced a 4k120 Hz screen. I'm having a refresh rate issue. I can overclock to 75 Hz under windows, but his. The bit depth has been changed from 10 bits to 8 bits. I'm wondering if this graphics card has limited bandwidth and can't support high resolution and high refresh rate? At the same time, only 4k60 Hz is supported under Mac OS. I have read your document about repair, but I don’t understand it very well. It does not mention a situation under Windows. Are there any detailed steps on how to increase this refresh rate to 120 Hz? Thank you so much. At the same time, I also noticed that Broadcom network card has been solved by someone on Xianyu, and the WiFi problem under the 14 system. Although I don’t know if it is true or not, I read the other party’s description and said that it can solve the problem of Broadcom network card under Mac OS14 system.
