Mac User Guide
- Welcome
- What’s new in macOS Sequoia
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- Intro to Continuity
- Use AirDrop to send items to nearby devices
- Hand off tasks between devices
- Control your iPhone from your Mac
- Copy and paste between devices
- Stream video and audio with AirPlay
- Make and receive calls and text messages on your Mac
- Use your iPhone internet connection with your Mac
- Share your Wi-Fi password with another device
- Use iPhone as a webcam
- Insert sketches, photos and scans from iPhone or iPad
- Unlock your Mac with Apple Watch
- Use your iPad as a second display
- Use one keyboard and mouse to control Mac and iPad
- Sync music, books and more between devices
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- Control what you share
- Set up your Mac to be secure
- Allow apps to see the location of your Mac
- Use Private Browsing
- Keep your data safe
- Understand passwords
- Change weak or compromised passwords
- Keep your Apple Account secure
- Use Mail Privacy Protection
- Use Sign in with Apple for apps and websites
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
- Copyright
See if your Mac shares space across APFS volumes
If you see more than one disk in the Storage area of General settings, your internal disk has multiple volumes.
macOS 10.14 or later uses a file system called Apple File System (APFS), which allows space to be shared between volumes on a disk. If a single APFS partition (or container) has multiple volumes, the container’s free space is shared and can be allocated to any of the volumes as needed. Each volume uses only part of the overall container, so the available space (shown in grey in the illustration above) is the total size of the container, minus the size of all volumes in the container. This overall amount of used space, including other volumes in the container, is indicated by a cross-hatched area.
To learn more about partitions, see Partition a physical disk in Disk Utility.