bigCursor 🖱️

Shake your mouse cursor and watch it grow HUGE!

The longer and faster you shake, the bigger it gets — until it fills your entire screen. Stop shaking and it smoothly shrinks back to normal.

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Download

⬇️ Download bigCursor (macOS 13+)

Homebrew (recommended)

brew tap callumreid/bigCursor https://github.com/callumreid/bigCursor
brew install --cask bigcursor

Installation

1. Download bigCursor.dmg from the link above
2. Open the DMG and drag bigCursor to your Applications folder
3. Important - bypass Gatekeeper (unsigned app):

   xattr -cr /Applications/bigCursor.app

4. Double-click to open, then grant Accessibility permissions when asked (System Settings → Privacy & Security → Accessibility)

That's it! Look for the 🖱️ in your menu bar.

Note: If you see "damaged and can't be opened", run the xattr -cr command above. The app isn't damaged — macOS blocks unsigned apps downloaded from the internet.

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How to Use

1. Shake your mouse rapidly for about 1.5 seconds
2. Watch your cursor start growing!
3. Keep shaking — it keeps growing bigger and bigger
4. Stop shaking — it smoothly shrinks back to normal

The faster you shake, the faster it grows. Max size fills most of your screen!

Toggle Light/Dark Mode: Click the 🖱️ menu bar icon to switch between a black cursor (dark mode) and white cursor (light mode).

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Quit / Uninstall

• Quit: Right-click the 🖱️ menu bar icon → Quit
• Uninstall: Drag bigCursor from Applications to Trash

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For Developers

Build from Source

git clone https://github.com/callumreid/bigCursor.git
cd bigCursor
swift build -c release
.build/release/bigCursor

Create Distributable App

chmod +x build-app.sh
./build-app.sh

This creates:

• bigCursor.app — the macOS application
• bigCursor.dmg — disk image for easy sharing

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Technical Details

• Tracks mouse velocity over a sliding window
• Requires 1.5 seconds of sustained rapid movement before growth begins
• Cursor grows up to 500x normal size
• Works across multiple displays
• Runs as a menu bar app (no Dock icon)
• Click menu bar icon to toggle light/dark mode

Requirements

• macOS 13.0 (Ventura) or later
• Accessibility permissions (for global mouse tracking)

License

MIT — do whatever you want with it!