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macOS User Guide
- 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
- What is Family Sharing?
- Set up Family Sharing
- Add a user or group
- Set up Screen Time for a child
- Share purchases with your family
- Watch and listen together with SharePlay
- Share a Photo Library
- Collaborate on projects
- Find content shared with you
- Find your family and friends
- Play games with your friends
- Resources for your Mac
- Resources for your Apple devices
If another system tries to connect to an app on Mac
When another computer tries to connect to an app on your Mac over the network or internet, macOS displays an alert message. The app may be trying to allow other computers to connect with your Mac, or it may be sharing information with other computers.
Note: If no action is taken, the message remains displayed, and any attempts to connect to the app are denied.
On your Mac, do one of the following:
If this type of behavior is expected from this app, click Allow.
If you don’t expect the app to connect across the network, or if you don’t want to share information, click Deny. This blocks attempts by other systems to connect to the app.
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