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macOS User Guide
- Welcome
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- Change System Preferences
- Change your desktop picture
- Add your email and other accounts
- Use a screen saver
- Change the picture for you or others in apps
- Set up other users on your Mac
- Set up Screen Time for yourself
- Change the system language
- Make it easier to see what’s on the screen
- Use accessibility features
- Run Windows on your Mac
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- Use Continuity across your devices
- Stream audio and video with AirPlay
- Use your iPad as a second display
- Hand off between devices
- Insert photos and documents from iPhone or iPad
- Insert sketches from iPhone or iPad
- Copy and paste between devices
- Use Apple Watch to unlock your Mac
- Make and receive phone calls on your Mac
- Control accessories in your home
- Send files between devices with AirDrop
- Use AirPods with your Mac
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- Manage cookies and other website data in Safari
- Use Private Browsing in Safari
- View privacy reports in Safari
- Understand passwords
- Reset your Mac login password
- Use keychains to store passwords
- Set up your Mac to be secure
- Guard your privacy
- Use Sign in with Apple for apps and websites
- Protect your Mac from malware
- Control access to your camera
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
- Copyright
Troubleshoot an Ethernet device on Mac
If you have an Ethernet device (such as a DSL or cable modem, or an Ethernet hub or router) connected to your Mac, and it doesn’t seem to be working properly, check the cables and network settings, and restart the device and your Mac.
Check the Ethernet cable to make sure it’s not damaged.
Make sure the Ethernet cable is securely connected to the Ethernet port on your computer and the device. Remove the cable, then reconnect it to make sure it’s connected properly.
Make sure your network settings are correct. If you’re not sure which settings to use, contact your ISP.
Shut down your Mac, then turn off the Ethernet device. Wait a few minutes, then turn the Ethernet device back on. Wait until it has started up completely, then restart your Mac.
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