macOS User Guide
- Welcome
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- Use Continuity across your devices
- Use your iPad as a second display
- Hand off between devices
- Insert photos and scans from iPhone or iPad
- Insert sketches from iPhone or iPad
- Copy and paste between devices
- Use Apple Watch to unlock your Mac and approve requests
- Make and receive phone calls on your Mac
- Control accessories in your home
- Send files between devices with AirDrop
- Use AirPods with your Mac
- Stream content to Apple TV
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- Understand passwords
- Use keychains to store passwords
- Reset your Mac login password
- Set up your Mac to be secure
- Guard your privacy
- Protect your Mac from malware
- Use Sign in with Apple for apps and websites
- Clear your Safari browsing history
- Manage cookies and other website data in Safari
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
What is secure virtual memory on Mac?
To keep your information safe, macOS uses secure virtual memory. Virtual memory is a technique computers use to temporarily move data from random-access memory (RAM) to the hard disk if the amount of available RAM is limited. If the data written to the hard disk as virtual memory is unencrypted, and is never overwritten, it could be captured if the hard disk is scanned, creating a potential security risk.
Secure virtual memory in macOS eliminates this risk by encrypting the data in virtual memory. Secure virtual memory is always on, so data is kept secure while it’s swapped between your hard disk and RAM. The RAM on your Mac contains no information when it’s turned off.
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