An intrepid Apple expert set out to convert an iMac on its last legs into a useful external monitor with the same general design and functionality as a new Studio Display. The inspiration comes from Apple’s recently released monitor using a 27-inch 5K LCD, as do all the iMacs made for many years.
Watch a video of this DYI project to see if this is something you’d like to do with that old iMac you have gathering dust.