Encore blog https://encore-ivory-omega.vercel.app/blog Guides and stories from the Encore team: turning an old iMac into a second screen, which cable to use, and what changed in each version. en Which old iMac can be a second screen? Every year, 2007–2020 https://encore-ivory-omega.vercel.app/blog/which-old-imac-can-be-a-second-screen https://encore-ivory-omega.vercel.app/blog/which-old-imac-can-be-a-second-screen Sun, 01 Nov 2026 09:00:00 GMT Every Intel iMac from 2007 to 2020, year by year: can it be a second screen for a new Mac, which cable does it need, and where Target Display Mode stops. Target Display Mode explained, and why it died https://encore-ivory-omega.vercel.app/blog/target-display-mode-explained https://encore-ivory-omega.vercel.app/blog/target-display-mode-explained Sun, 01 Nov 2026 09:00:00 GMT What Target Display Mode was, which iMacs and Macs Apple lists for it, why no Mac from 2020 or later can use it, and what still works with an old iMac today. Every way to use an old iMac as a monitor, compared https://encore-ivory-omega.vercel.app/blog/every-way-to-use-an-old-imac-as-a-monitor https://encore-ivory-omega.vercel.app/blog/every-way-to-use-an-old-imac-as-a-monitor Sun, 01 Nov 2026 09:00:00 GMT Target Display Mode, AirPlay, Luna Display, Duet, RetinaRelay, MacDisplay, Encore and hardware mods, compared with sources, including where each one wins. The 27 dB problem: why second-screen text looks soft https://encore-ivory-omega.vercel.app/blog/the-27-db-problem https://encore-ivory-omega.vercel.app/blog/the-27-db-problem Sun, 01 Nov 2026 09:00:00 GMT Video codecs halve colour detail, so red and blue text stays soft at any bitrate. Our measurements: 27 dB through H.264, 51 dB with ProRes 4444, exact tiles.