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macOS User Guide
- Welcome
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- Work across devices using Continuity
- Use iPhone as a webcam
- Use iPhone with Desk View
- Stream audio and video with AirPlay
- Use one keyboard and mouse to control Mac and iPad
- Hand off between devices
- Unlock your Mac with Apple Watch
- Make and receive phone calls on your Mac
- Sync music, books and more between devices
- Resources for your Mac
- Resources for your Apple devices
- Copyright
If no app is set to open a document on Mac
If you can’t open a document because there is no default app set to open it, you can either choose an app already installed on your Mac or go to the App Store to find more apps.
Search the App Store: Click Search App Store to open the App Store. A list of apps that can open this type of document appears.
Choose an app that’s on your Mac: Click Choose Application, then choose an app from the list. Only apps that can open this type of document are available. Other apps are dimmed.
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