A macOS app called Dorso blurs the screen when the user slouches, using either the Mac's camera or AirPods motion sensors to monitor posture. The app provides a gentle reminder to sit up straight and can be configured to adjust its sensitivity and blur settings. Dorso is open-source and available for download, with some users expressing interest in paying for a notarized version. The app's developer has released it on the app store and has addressed some user concerns and suggestions in the comments.