Enabling HDPI for External Displays on Mac

October 13, 2018 - 1 minute read - Category: Tech
  1. Install a shell script based on instructions on GitHub repo. After running this shell, you can find your current display’s ProductID and VendorID.
  2. According to these 2 IDs, generate your configure file on this page.
  3. Turn off your Mac’s SIP:
    1. Restart your Mac and go to the recovery mode by pressing ⌘+R
    2. In recovery mode, open terminal and execute csrutil disable to disable SIP
  4. Move the config file to this path: /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-{yourVendorID}/DisplayProductID-{yourProductID}. Restart your computer then.
  5. Download RDM, and then switch your resolution!
  6. Don’t forget turn on SIP by execute csrutil enable in terminal in recovery mode.