Enable HiDPI for external monitor in Big Sur

App & System Services Core OS
wnsoft OP
Created Dec ’20
Replies 26
Boosts 1
Views 28k
Participants 29
How I can force HiDPI on external monitor 2560x1440 to use it as virtual 1280x720 in Big Sur?

RDM doesn't show any Retina resolution.

I tried to generate displayproductid-***.plist for my monitor using a script: codeclou.github.io/Display-Override-PropertyList-File-Parser-and-Generator-with-HiDPI-Support-For-Scaled-Resolutions/

But 

Code Block 
ioreg -l | grep "DisplayProductID" 
ioreg -l | grep "DisplayVendorID"

returns nothing.

Also I tried this script: github.com/xzhih/one-key-hidpi - doesn't work, too.

Note that this folder cannot be modified even when SIP is disabled: /System/Library/Displays/Contents/Resources/Overrides/
Replies  26
Boosts  1
Views  28k
Participants  29
AppsManderC OP
Jun ’21

That must be fixed. This is a developer tool to test if an app runs with HiDPI. Apple does not need to turn it on by default. Just do it as it has been working before BigSur and allow to turn it on for developers. A small developer can not afford an apple certified monitor.

0
Mark721 OP
Jun ’21

Same issue, spent hours trying to fix this... So now i just use my external monitor for web and upped the scale to 125% in chrome. Hope they fix this soon

0
beatwade OP
Jun ’21

Hi, I've met the same situation, and handle this by adding a 4k lock screen tool, and then can open hidpi, hope can help somebody

0
Bmju OP
Mar ’22

For me, this works:

sudo defaults write /Library/Preferences/com.apple.windowserver.plist DisplayResolutionEnabled -bool true

Found at https://www.alphr.com/hidpi-mode-os-x/ .

0
nick318 OP
May ’22

Here is what helped me:

https://www.youtube.com/watch?v=zpZHbKambto

https://github.com/waydabber/BetterDummy

2
kosty OP
Oct ’22

Get this fixed, please...

0
Pareshh OP
Aug ’23

Seriously its a huge problem, Just recently bought a Mac mini with m2 chip, and being a designer its very irritating to see pixelated display. I really love apple though, but these are the basic things to look at right, after a lot of hardwork was able to get this machine, now to have an expensive display feels like a big task, :) Peace.

0
Goodwu1980 OP
Oct ’23

Please add HiDPI to 2560x1440 24inch monitor

0
vivek1401 OP
Nov ’23

They're never gonna fix it. I found a good solution involving a free open source library. https://www.reddit.com/r/MacOS/comments/sqwsh5/comment/k9nuaxq

0
hgv2_0 OP
Nov ’23

thank you so much @vivek1401 it works like a charm on my 27inch external monitor

0
maggy535 OP
Dec ’23

Hi there from 2023, I spent about 1 hour 30 minutes to solve the problem for MacBook Pro M1 13" + Apple Thunderbolt Display and it's works!

https://github.com/xzhih/one-key-hidpi

0
Enable HiDPI for external monitor in Big Sur
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