WindowMizer
WindowMizer is a macOS utility that rolls up windows like a windowshade, helping you manage desktop space without sending windows to the Dock.
What is WindowMizer?
WindowMizer is a native macOS window-management utility that helps users reduce clutter by collapsing open windows in place instead of minimizing them to the Dock. It is designed for people who work with many overlapping windows and want faster access to items they are not actively using. The app lets you double-click a title bar to roll a window up, restore it later, and use compact thumbnail windows for quick identification along screen edges. It also includes settings for shortcuts, title bar behavior, app-specific adjustments, and other desktop-control options that support different workflows. WindowMizer is published by RGB World, Inc. and is intended for Mac users who want classic window-shading behavior and more flexible control over how windows stay visible on screen.
Key features
- Roll up windows in place by double-clicking the title bar
- Restore collapsed windows to their previous size without searching the Dock
- Create thumbnail windows for compact on-screen access
- Customize shortcuts and title bar behavior
- Adjust settings for specific apps and window handling
- Hide desktop icons for a cleaner workspace
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Safety overview
Status: Mostly safe
WindowMizer is legitimate desktop utility software for macOS. To work as intended, it may request Accessibility access so it can control window behavior across other apps, and newer versions may also use screen capture features for window thumbnails or overlays. Those permissions are normal for this kind of window-management tool, but they give the app broad visibility into on-screen activity, so install it only if you want its features and are comfortable granting those permissions.
Recommendation: Keep WindowMizer if you actively use its window-shading or thumbnail features, especially on crowded desktops or smaller screens. If you no longer use it, you can remove it and revoke its permissions in macOS settings; doing so will simply stop its window-management features from working.
Common paths
/Applications/WindowMizer.app
Preference paths
~/Library/Preferences/com.rgbworld.WindowMizer.plist
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