Input Source Pro
Input Source Pro is a macOS utility for multilingual typing that automatically switches keyboard input sources by app or website and shows the current layout.
What is Input Source Pro?
Input Source Pro is a macOS utility that helps multilingual users manage keyboard input sources more smoothly while moving between apps and websites. It is designed for people who regularly switch languages or keyboard layouts during work, study, coding, browsing, or messaging. The app can automatically change to a preferred input source for specific apps, and it also supports website-based switching in supported browsers. It includes an on-screen indicator so you can quickly see which input source is active, along with shortcut options for faster manual switching. Input Source Pro also offers app-specific punctuation behavior and per-app function key mode changes, which can be useful for coding tools, terminals, productivity apps, and everyday desktop use. Published by Runju Huang, it is built specifically for macOS.
Key features
- Automatically switch input sources when you change apps
- Set different input sources for specific websites in supported browsers
- Show the current keyboard or input source with an on-screen indicator
- Use keyboard shortcuts or modifier-key shortcuts to switch layouts quickly
- Apply English punctuation behavior for selected apps
- Change function key mode for individual apps
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Safety overview
Status: Mostly safe
This is a legitimate macOS utility for managing keyboard input sources and related typing behavior. To work as intended, it may need normal macOS permissions related to input control or accessibility-style automation, and those requests are consistent with its purpose. Because it can react to the app you are using and the website you are viewing in supported browsers, you should review its settings and grant only the permissions you are comfortable with. Removing it will stop its automatic switching, indicator, and shortcut features, but it should not affect macOS input sources themselves.
Recommendation: Keep Input Source Pro if you rely on automatic keyboard switching, layout reminders, or app-specific typing behavior on your Mac. If you no longer use those features, you can remove it without harming macOS, though your custom switching rules and preferences may be lost.
Common paths
/Applications/Input Source Pro.app
Preference paths
~/Library/Preferences/com.runjuu.Input-Source-Pro.plist
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