Red pixels in the highlight areas of the photos
Red pixels appear in the highlight areas of my photos stored in Aperture when viewing the photo in Split View and Viewer mode. The problem seems to be just a display issue, because the photos export without the red pixels.
This just started happening in the past few months. I am running High Sierra 10.13.6 on an iMac 2011. Any ideas about what's causing the display issue or how to remedy?