Insomnia

A lightweight macOS menu bar app that prevents your Mac from sleeping.

Features

• Keep Your Mac Awake — Prevent sleep for 10 min, 30 min, 1 hour, indefinitely, or set a custom duration
• Menu Bar App — Lives in your menu bar, always one click away
• Customizable Icons — Choose from 6 different icon styles
• Smart Notifications — Get notified before the timer expires
• Prevent Manual Sleep — Optionally block sleep from Apple menu and power button
• Launch at Login — Start automatically when you log in

Installation

Download

Download the latest release from the Releases page.

Install

1. Open the downloaded DMG file
2. Drag Insomnia to your Applications folder
3. Launch Insomnia from Applications

First Launch

Since the app isn't notarized, macOS will block it on first launch. To open it:

1. Right-click (or Control-click) on Insomnia in Applications
2. Click Open from the context menu
3. Click Open in the dialog that appears

Alternatively: System Settings → Privacy & Security → scroll down → click "Open Anyway"

You only need to do this once.

Usage

1. Click the Insomnia icon in your menu bar
2. Select a duration (10 min, 30 min, 1 hour, indefinite, or custom)
3. Click Start — your Mac will stay awake until the timer ends
4. Click Stop anytime to allow sleep again

Verify It's Working

Run this in Terminal to confirm sleep prevention is active:

pmset -g assertions

Look for: Insomnia is keeping the system awake

Requirements

• macOS 15.4 or later

Building from Source

1. Clone the repository
2. Open Insomnia.xcodeproj in Xcode 16.3+
3. Build and run (⌘R)

License

MIT License - see LICENSE for details.