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macOS User Guide
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Welcome
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Use Continuity across your devices
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Use your iPad as a second display
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Hand off between devices
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Insert photos and scans from iPhone or iPad
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Insert sketches from iPhone or iPad
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Copy and paste between devices
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Use Apple Watch to unlock your Mac and approve requests
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Make and receive phone calls on your Mac
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Control accessories in your home
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Send files between devices with AirDrop
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Use AirPods with your Mac
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Stream content to Apple TV
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Understand passwords
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Use keychains to store passwords
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Reset your Mac login password
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Set up your Mac to be secure
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Guard your privacy
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Protect your Mac from malware
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Use Sign in with Apple for apps and websites
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Clear your Safari browsing history
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Manage cookies and other website data in Safari
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Find a missing device
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Resources for your Mac
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Resources for your Apple devices
See the contents of a disk image on Mac
A disk image is a compressed copy of the contents of a disk or folder. Disk images have .dmg at the end of their names. To see the contents of a disk image, you must first open the disk image so it appears on the desktop or in a Finder window.
On your Mac, double-click the image to open it.
Double-click the opened disk image to see its contents.
If you have problems with a disk image, you can verify and possibly fix it using Disk Utility.
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