Saul walks through the one-minute Mac setting that swaps blue light for red at night — Accessibility, Display, Color Filters — plus the menu-bar shortcut that makes it actually stick, and the one keyboard combo to avoid (it audibly announces itself, at the worst possible time). Saul and Lydia also cover why the same trick works on iPhone, iPad, and Apple Watch too.
Full write-up, sources, and links: https://saulbarden.com/2026/07/11/how-to-make-mac-screen-red-light-for-better-sleep/