Fix magenta/purple screen

The following repository is for archiving the script for fixing magenta/purple screen on macOS. Please note that I do not own any part of the script. This is simply an upload as the main reddit post was flagged as spam.

I'll leave the original link to pay respects: Press F to pay respects

Requirements

• Connected display with magenta/purple screen issue
• Basic BASH navigation knowledge
• Disabled SIP

Usage

Step 1: check SIP status

First of all you need to check if your SIP is disabled or not. To do this, open a terminal window and type:

csrutil status

If the output is like:

System Integrity Protection status: disabled.

then you can proceed to the next step.

Note: starting from macOS Catalina, the / partition is mounted in read-only mode. You need to mount it in read-write mode by using the following command:

sudo mount -uw /

Step 2: patch-edid.rb

From a terminal window type:

./patch-edid.rb

It will output a folder called DisplayVendorID-XXXX/.

Then copy the folder into:

• /System/Library/Displays/Contents/Resources/Overrides
• /System/Library/Displays/Overrides for < El Capitan

by using:

sudo su for getting elevated privileges

then copy the folder to:

cp -R DisplayVendorID-XXXX /System/Library/Displays/Contents/Resources/Overrides

or

cp -R DisplayVendorID-XXXX /System/Library/Displays/Overrides if on < El Capitan

Finally reboot and you should have fixed monitor colours :)

Issues

If you encounter any issue, please file a bugreport here

Credits

• Apple for macOS
• von Andreas S. for forum thread on embdev.net