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
If you don’t have permission to use files on a Mac disk
If you don’t have permission to use the files on a disk that’s connected to your Mac and you are not the administrator of the Mac, ask the administrator to give you access to the disk.
If you’re the administrator, you can select an option to ignore ownership of those files. When this option is selected, your Mac treats all files on the disk as though they are owned by the current user, no matter who actually owns them.
On your Mac, click the Finder icon
in the Dock to open a Finder window.Select the disk, then choose File > Get Info.
Click
next to Sharing & Permissions to expand that section.If the lock at the bottom right is locked
, click it to unlock the permissions.Select the “Ignore ownership on this volume” tickbox.
Note: If you have used the external drive for Time Machine backups, this option doesn’t appear.