macOS User Guide
- Welcome
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- Change System Preferences
- Change your desktop picture
- Add your email and other accounts
- Use a screen saver
- Change the picture for you or others in apps
- Set up other users on your Mac
- Set up Screen Time for yourself
- Change the system language
- Make it easier to see what’s on the screen
- Use accessibility features
- Run Windows on your Mac
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- Use Continuity across your devices
- Stream audio and video with AirPlay
- Use your iPad as a second display
- Hand off between devices
- Insert photos and documents from iPhone or iPad
- Insert sketches from iPhone or iPad
- Copy and paste between devices
- Use Apple Watch to unlock your Mac
- Make and receive phone calls on your Mac
- Control accessories in your home
- Send files between devices with AirDrop
- Use AirPods with your Mac
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- Manage cookies and other website data in Safari
- Use Private Browsing in Safari
- View privacy reports in Safari
- Understand passwords
- Reset your Mac login password
- Use keychains to store passwords
- Set up your Mac to be secure
- Guard your privacy
- Use Sign in with Apple for apps and websites
- Protect your Mac from malware
- Control access to your camera
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
- Copyright
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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