0

I'm trying to force RGB mode in macOS to fix the picture quality of my external monitor. I had to do this when I got my MacBook 16". Now, after installing Big Sur, the problem reappears.

The instructions I've followed are:

  1. Run:

    csrutil disable

    in recovery mode in order to disable rootless mode.

  2. Run the following patch:

    patch-edid.rb

    and then do the following:

    sudo mkdir /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-472
sudo cp DisplayProductID-361 /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-472

but Terminal returns this error: 'read-only' file system

I tried the following:

mount -o remount /

But Terminal fails with this error: mount: / failed with 64

jaume
  • 15,010
kanayt
  • 361
  • I believe Big Sur has an extra layer of security when it comes to system files/root that requires a few extra steps beyond just disabling SIP. However, I can't advise you how to do it, as I am waiting for some examples before I do it myself. You can search up about Signed System Volume (SSV) that Apple has introduced in Big Sur. – AVelj Nov 14 '20 at 10:40
  • Make sure you have a backup before moving forward, and also verify whether the patch is valid for Big Sur. – nohillside Nov 24 '20 at 14:46

0 Answers0