Not all resolutions marked with ⚡️ (lightning) work on external display

[louisamand]

Macbook Pro (M1), macOS Monterey 12.5.1
2560 x 1440 external monitor

Most lightning resolutions do not work. I click on it and nothing happens. The resolution stays as per last valid command.
The resolutions without lightning work "fine" but are very blurry/pixelated.

So far, only those two work:

• 1280 x 720 ⚡️
• 1024 x 576 ⚡️
  (Not even 2560 x 1440 ⚡️ does work)

Is there anything to change ?

[edobobo]

I have the exact same issue

[mehdinourollah]

M1 Air with Samsung 27-inch FullHD LF27T450F ...same issue

[ultramar1ne]

same for me

[KevinBaynham]

Same issue here. Hardware:

External monitor: Dell P2720D (connected via HDMI)
Laptop: Macbook Pro (13-inch, M2, 2022) 16GB, macOS Monterey

[alphalyncis]

same here, except that only 1024 x 576 ⚡️ worked for me. Not even 1280 x 720 ⚡️. Macbook Pro (M1), macOS Monterey 12.6

[jbaladao]

Maybe now this works only native HiDPI resolutions (look at Display Resolutions at 12.x and 13 Ventura OSX), very sad, I use BetterDisplay to solve this limitation, but not smoth like RDM.

[wellenmacher]

Venture 13.0 - same issue (RDM not activating the HDPI resolutions) on a 4k display.
Also Mac is not showing me even 1080p as HDPI anymore, blurry text :(

[necmettin]

Do you quit and reopen RDM when you connect the external display? When you do that, RDM lists two separate monitors.

[avibrazil]

The code is not being maintained anymore.
I didn’t write the code, just packaged the app for easier installation.

[shaga82]

Had the same issue and did below steps to get additional resolutions with ⚡️ I found here.

1. Open a new terminal window and simply copy-paste the below command.

$sudo defaults write /Library/Preferences/com.apple.windowserver.plist

DisplayResolutionEnabled -bool true

2. When you have completed the 1st step, press the ‘Return key’ to run the command. However, since it is a Sudo command, you need to enter the Admin password. Apple, and we hope the Mac is yours!

3. At last, reboot the device for the changes to take effect.