Packed Pixels HiDPI Retina using SwitchResX

packed-pixels-switchresx.md

On OS X the Packed Pixels display won't automatically show up as "Retina" or "HiDPI" resolution, instead the OS will use the full resolution of the display making everything tiny. This can be changed using the 3rd party app (non-free) SwitchResX.

First, download SwitchResX.

You can play with the resolutions for the Packed Pixels which is probably listed as Color LCD (2). However not all of the HiDPI resolutions work due to an OS X bug. If you are happy with any of the ones that do work then stop here, else continue.

If you're on El Capitan or later you need to disable System Integrity Protection (temporarily) to add a custom resolution for Packed Pixels. Follow the instructions from SwitchResX creator.

Now add a Custom Resolution that is "scaled". It must be 2 pixels bigger or smaller than the native resolution in one direction (this is the OS X quirk). I found bigger makes it slightly blurry so go with smaller—I chose "2046x1536". Hit cmd+s or File => Save. Then reboot.

Once rebooted start SwitchResX again and choose the resolution you created in the Current Resolutions tab. Note it will be halved! So in my case it's 1023x768.

If all looks good you can turn on System Integrity Protection again (recommended). For me at least this procedure resulted in a beautiful clear picture on the Packed Pixels, just what I'd hoped.

Works great on macOS High Sierra too! Looks Beautiful!

I'm on High Sierra and I was able to add the custom resolution for only one of my two panels. For the other panel I've added it but it keeps saying "not installed", even after I rebooted. I've also made sure SIP is disabled.

But in any case, the 1024x768 resolution seems to work just fine.. which makes me question what the fuss is about with creating one that lets you do 1023x768