Set a Retina display to custom resolutions
To manually install RDM with Homebrew, use the following command:
Current version of RDM.app: 2.5.0
ARM: https://github.com/usr-sse2/RDM/releases/download/2.5.0/RDM.zip
Intel: https://github.com/usr-sse2/RDM/releases/download/2.5.0/RDM.zip
Website: https://github.com/usr-sse2/RDM