Mac User Guide
- Welcome
- What’s new in macOS Sequoia
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- Get started with Apple Intelligence
- Use Writing Tools
- Use Apple Intelligence in Mail
- Use Apple Intelligence in Messages
- Use Apple Intelligence with Siri
- Get webpage summaries
- Summarize an audio recording
- Use Apple Intelligence in Photos
- Summarize notifications and reduce interruptions
- Apple Intelligence and privacy
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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
Use a dynamic global hostname on Mac
If your service provider supports secure dynamic DNS update (RFC 3007), you can give your Mac a global DNS hostname so other computers outside your local network can refer to it by name.
Even if the IP address for your Mac changes at regular intervals, your Mac automatically updates its global DNS hostname to point to its current IP address.
On your Mac, choose Apple menu
in the sidebar, then click Sharing. (You may need to scroll down.)Click Edit in the “Local hostname” section at the bottom of the window, then turn on “Use dynamic global hostname.”
Enter the hostname, user, and password for the account.
Ask your service provider or domain administrator for the user and password so your Mac can update its hostname every time its address changes.
If your service provider supports Wide-Area Bonjour registrations, you can also turn on “Advertise services in this domain using Bonjour” to advertise your computer’s active sharing services in its domain.
If Bonjour browsing is enabled for this domain, other computers see the services listed automatically in their apps, based on the search domains entered in their Network settings or based on information returned by DHCP.
