duet
Duet is a Mac productivity app that extends your desktop to an iPad, iPhone, or other device for extra screen space and remote work.
What is duet?
Duet is a productivity app for Mac that lets you use an iPad, iPhone, and some other supported devices as an additional display for your computer. It is designed for people who want more screen space while working, traveling, drawing, or multitasking without carrying a second monitor. Common uses include turning a tablet into a wired or wireless second screen, adding touch input to Mac workflows, and setting up remote desktop access between devices. Duet also offers features aimed at creative and professional work, such as Apple Pencil support in higher-tier plans and display options for portable workstation setups. On macOS, users typically encounter it as a companion desktop app that works together with the mobile app or account services from Duet, Inc.
Key features
- Turn an iPad or iPhone into a second display for your Mac
- Extend or mirror your Mac screen on a connected device
- Use touch gestures on a supported device to interact with your Mac
- Connect over cable for low-latency display performance
- Work wirelessly with supported remote and display modes
- Use Apple Pencil features in supported pro drawing workflows
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Safety overview
Status: Mostly safe
Duet is legitimate display-extension software, and it may ask for permissions that are normal for this kind of app, such as Screen Recording or Accessibility access, so it can capture and control your desktop correctly. It can also run background helpers while you are using connected-display or remote features. Keep it only if you use its second-screen or remote workflow, and review its granted permissions if you no longer need those features.
Recommendation: Keep Duet if you use it to add a second screen or remote access from another device. If you no longer use those features, you can remove it and clean up its remaining support files; doing so may stop device pairing, saved settings, and related background components from working until the app is installed again.
Common paths
/Applications/Duet.app
Cache paths
~/Library/Caches/com.kairos.duetMac
Support paths
~/Library/Application Support/Duet
Preference paths
~/Library/Preferences/com.kairos.duetMac.plist
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