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I recently updated my MacBook Pro to BigSur. Although it is running fine, it is not recognising my external display properly (just like in any previous MacOS release). Long back I had got solution which is explained here. In order to do that, I need to override the display settings by copying a file to /System/Library/Displays/Contents/Resources/Overrides/

But my problem is I am unable to copy the file to the above directory as it is read-only.

The steps I followed,

  • I disabled the SIP by booting into recovery
  • I rebooted my MacBook Pro

And I am on my admin account.

When I was in my MacOS Catelina, I was able to copy that file to above location.

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  • I ran across this online and found (a different) article about that. TD;LR SIP has changed and you need to do more eclecticlight.co/2020/06/25/… Commented Nov 28, 2020 at 23:45
  • Thanks Steve. I went through the article you have shared. To be frank, I do not know that much deep in MacOS operating system. What I understood is, it very hard to to make any changes to the system volume as now everything is SHA hashed! Commented Nov 29, 2020 at 3:01
  • Hi again Steve, I solved my issue by copying it to /Library/... folder as explained in developer.apple.com/forums/thread/649832 Commented Nov 29, 2020 at 3:59

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  • Answers should be more than just a link which doesn’t even link. Can you please summarize the linked page in your answer so it stands on its own?
    – nohillside
    Commented Nov 29, 2020 at 5:45
  • Sure. I have added the links and some information which could help someone Commented Nov 29, 2020 at 7:24

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