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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 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 off.
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