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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
What is a digital identity?
A digital identity is an electronic way of identifying someone. It consists of a certificate containing a “public key,” which is viewable, and a “private key,” which is kept secret.
Your private key lets you sign an electronic document with a signature that others can verify using only your public key. Likewise, your private key can decrypt documents that were encrypted by others using your public key.
For a digital identity to be accepted as a valid item, it needs to be trusted by the recipient. To help ensure the authenticity of a digital identity, certificate authorities supply digital identities to individuals whose identities have been verified. See What’s a certificate?
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