Reading Time: < 1 minute Problem 1280×720 HiDPI mode does not work using SwitchResX, RDM or similar utility with an external monitor on a Retina MacBook Pro. Solution Use a custom scaled resolution with SwitchResX as a work around. SwitchResX allows you to add custom “Retina” resolutions by adding exactly double the horizontal and vertical values of the desired HiDPI […]