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Developer builds open-source macOS screen-cleaning and pet-lock app in under 3 hours

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A developer has released CleanMyScreen, a free, open-source macOS utility designed to solve two common frustrations: cleaning a laptop screen without accidentally waking it, and preventing pets or children from disrupting keyboard input. The app offers three modes — a full black overlay for screen cleaning, a pet or kid lock that keeps the current video visible while disabling input, and a selective mode for custom combinations. Built using SwiftUI, AppKit, IOKit, and Core Graphics, the app performs no network calls and requires no user account. The entire functional build was completed in under three hours using OpenAI's Codex, with the developer spending additional time on UX polish such as countdown animations and an emergency unlock flow. CleanMyScreen is MIT-licensed, supports both Apple Silicon and Intel Macs, and is available on GitHub with no Xcode installation required to build from source.

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Developer builds open-source macOS screen-cleaning and pet-lock app in under 3 hours · ShortSingh