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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
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- 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
- Copyright
If you can’t open an app on Mac
You may not have the privileges to open the app, the app may be damaged, or it may not be installed.
If you aren’t an administrator of your Mac, the administrator may be preventing you from using the app. Contact the administrator of your Mac.
You may be trying to open an app that is not registered with Apple by an identified developer. If you want, you can open an app from an unidentified developer.
If you recently installed a new version of macOS, some apps may need to be updated or reinstalled. See Install and uninstall apps from the Internet or disc.
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