These approaches have obvious drawbacks and limits.īetterDummy solves the problem by creating a flexible virtual 'dummy' display that supports an unprecedented range of Retina resolutions. Others use the built in screens of their MacBooks as a mirror source. To fix these issues, some resort to buying a 4K HDMI dummy dongle to fool macOS into thinking that a 4K display is connected and then mirror the contents of this dummy display to their actual monitor in order to have HiDPI resolutions available. On other Macs the resolution options for wide displays are too constrained. The new Apple Silicon Macs notoriously don't allow sub-4K resolution displays to have HiDPI ('Retina') resolutions even though most 1440p display would greatly benefit from having a HiDPI 'Retina' mode. Some Macs tend to have issues with custom resolutions.
