Zooom3

A macOS utility that adds modifier key + mouse window move and resize, inspired by X11/Linux window managers and the classic Zooom2 app.

Zooom3 is a fork of Easy Move+Resize by Daniel Marcotte, with additional features to match the Zooom2 experience.

Features

• Move windows: Hold modifier keys + left-click drag anywhere in a window
• Resize windows: Hold modifier keys + right-click drag (direction based on cursor position in the window's thirds grid)
• Hover mode: Hold modifier keys and windows move/resize as the mouse moves — no click needed (like Zooom2)
• Customizable modifiers: Choose any combination of Cmd, Ctrl, Alt, Shift, Fn
• Separate resize modifiers: Configure different modifier keys for resize
• Per-app disable: Disable Zooom3 for specific applications
• Configurable mouse buttons: Choose which mouse button triggers move vs resize

Installation

Download the latest release from the Releases page, unzip, and drag Zooom3 to your Applications folder.

macOS Security

Zooom3 is not signed with an Apple Developer certificate, so macOS will block it the first time you open it. This is normal and expected for open-source utilities distributed outside the App Store.

macOS Sequoia (15) and later:

1. Double-click Zooom3 — macOS will show a warning and refuse to open it
2. Open System Settings > Privacy & Security
3. Scroll down — you'll see a message about Zooom3 being blocked
4. Click Open Anyway and confirm with your password

macOS Sonoma (14) and earlier:

1. Right-click (or Control-click) Zooom3 and select Open
2. Click Open in the confirmation dialog

You only need to do this once. After that, Zooom3 will open normally.

Accessibility Permission

Zooom3 needs Accessibility access to move and resize windows. On first launch, it will guide you through granting this permission. If you ever need to reset it:

1. Open System Settings > Privacy & Security > Accessibility
2. Remove Zooom3 from the list
3. Re-launch Zooom3 and follow the onboarding prompt to re-add it

Usage

Zooom3 runs as a menu bar app.

• Move: Cmd + Ctrl + Left Mouse drag anywhere in a window
• Resize: Cmd + Ctrl + Right Mouse drag anywhere in a window
  • Resize direction is based on which region of the window you click (thirds grid)
• Hover mode: Enable via menu, then just hold modifiers — no click needed
• Modifier keys can be customized from the menu bar icon
• Toggle Disabled to pause all functionality
• Bring Window to Front raises background windows when moving/resizing them
• Reset to Defaults restores original settings

Contributing

Contributions welcome! File issues or submit pull requests on GitHub.

License

MIT — see LICENSE.txt