Force HiDPI Resolutions for Dell U2515H Monitor

Custom scaled resolutions on macOS

Introduction

My company got me a new Dell U2515H which is pretty neat but does not have a 4K resolution. It comes with a 2560x1440 resolution and a miniDisplayPort to DisplayPort cable.

Forcing a HiDPI Resolution on Dell U2515H

So coming from Windows and just recently switched to mac I thought: “I will just have to scale the fonts a little like I do on Windows with 150% or so….”. After some intense clicking around in the monitor settings and some googling the sad reality caught up with me. There is no such thing to easily achieve HiDPI resolutions on an external Monitor.

Challange Accepted!

Alright! So there must be some config file somewhere to tell macOS to do what I want it to do!

Getting down to business!

First I will explain how the PropertyFile’s scale resolution’s base64-Strings need to be interpreted.

PropertyList viewed with Xcode
AAAKAAAABaAAAAABACAAAA==
<00000a00 000005a0 00000001 00200000>

Forcing 1920x1080 HiDPI

I will simplify the procedure from here on, if you want to know the whole process read the step-by-step tutorial on the PropertyList Parser and Generator page.

sudo cp ~/Downloads/DisplayProductID-d06e.plist /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-10ac/DisplayProductID-d06e

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