ステアーマウス
SteerMouse is a macOS utility that customizes multi-button mice with button assignments, scrolling options, and pointer controls beyond standard system settings.
What is ステアーマウス?
SteerMouse is a native macOS mouse customization utility for people who want more control over USB and Bluetooth mice than the built-in system settings provide. It helps users assign actions to extra mouse buttons, adjust scrolling behavior, and fine-tune pointer movement for everyday work, creative tasks, and power-user workflows. The app supports per-application customization, so the same mouse can behave differently in different apps when needed. Users can map clicks, modifier actions, keyboard shortcuts, and app-switching behavior to mouse buttons, which is useful for productivity and repetitive tasks. It also includes more detailed cursor and wheel settings than macOS offers by default. SteerMouse is published by Plentycom Systems and is designed for Mac users who rely on third-party mice as part of their daily setup.
Key features
- Assign custom actions to extra mouse buttons
- Map buttons to keyboard shortcuts and modifier clicks
- Create per-app mouse settings for different workflows
- Adjust scrolling and wheel behavior in more detail
- Fine-tune cursor movement and pointer response
- Switch applications or trigger common actions from mouse buttons
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Safety overview
Status: Mostly safe
SteerMouse is legitimate mouse utility software for macOS. Because it changes how mouse buttons and pointer behavior work across the system, it may request accessibility-related permissions or similar access that is normal for this kind of input customization tool. Those permissions let it intercept button presses and apply your custom mappings, so you should grant access only if you actively use the app. Removing it will stop custom mouse assignments and may return your mouse behavior to standard macOS settings.
Recommendation: Keep SteerMouse if you use a multi-button or third-party mouse and depend on custom button mappings, scrolling adjustments, or app-specific profiles. If you no longer use those features, you can remove it, but expect your mouse to fall back to the standard controls provided by macOS or the device vendor.
Common paths
/Applications/SteerMouse.app
Cache paths
~/Library/Caches/jp.plentycom.app.SteerMouse
Preference paths
~/Library/Preferences/jp.plentycom.app.SteerMouse.plist
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