Who said all privacy protections had to be digital nowadays? Travelers and remote workers who regularly use laptops in coffee shops, trains, and hotel lounges often face shoulder-surfing risks, which makes a new Mac app called Shy Glass an appealing idea.
Shy Glass comes from developer Max Rovensky, who posted a 10-second demo on X last month that has since gathered over 230,000 views. While wearing AirPods, if you turn your head beyond a set angle, your MacBook screen blurs, and it unblurs when you turn back. The app uses the same motion sensors Apple relies on for dynamic head tracking in Spatial Audio, but applies the data to detect presence rather than keep music anchored.
Users calibrate a center position from the menu bar. When head positioning drifts past a set angle, which defaults to 15° and can be adjusted from 2° to 30°, a blur fades in over the display until it is fully covered.
The app's permissions raise questions. Shy Glass requires Screen Recording, one of the most powerful permissions on the Mac, so it can see everything on screen. The developer says snapshots stay in memory and are never saved or uploaded, and capture stops once the blur is applied. The author has no reason to doubt that claim, but macOS has no way to enforce it, so users are essentially trusting the developer's word. Even so, the author finds the app's functionality useful more often than not.
Source: 9to5Mac · Summarized by HeadlinesBriefing