BlackLid

Overview

BlackLid is an experimental open-source macOS menu bar app for disabling the built-in MacBook display while keeping an external monitor active.

The Challenge

macOS normally treats the built-in display as an active workspace unless the lid is closed; BlackLid explores a focused software-only path for external-monitor workflows.

Core Tech Stack

Key Features

• 01 Menu bar action
• 02 External-monitor safety gate
• 03 Baseline save and restore
• 04 Restore verification
• 05 5-cycle safety test
• 06 Troubleshooting tools
• 07 Alpha GitHub release packaging