Mac User Guide
- Welcome
- What’s new in macOS Tahoe
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- Intro to Apple Intelligence
- Translate messages and calls
- Create original images with Image Playground
- Create your own emoji with Genmoji
- Use Apple Intelligence with Siri
- Find the right words with Writing Tools
- Summarise notifications and reduce interruptions
- Use ChatGPT with Apple Intelligence
- Apple Intelligence and privacy
- Block access to Apple Intelligence features
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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
- Resources for your Mac
- Resources for your Apple devices
- Copyright and trademarks
Change Firewall settings on Mac
On your Mac, use Firewall settings to turn on the firewall in macOS to prevent unwanted connections from the internet or other networks. Learn how to block connections to your Mac with a firewall.
To change these settings, choose Apple menu 
in the sidebar, then click Firewall. (You may need to scroll down.)
Option | Description |
|---|---|
Firewall | Prevent unwanted connections from the internet or other networks. |
Options | Choose how much to block incoming connections. |
Block all incoming connections | Prevent incoming connections to non-essential services and apps. Basic Internet services are a set of apps that allow your Mac to find services provided by other computers on the network. This setting prevents connections to all other sharing services. |
Add | Add an app or service to allow incoming connections. |
Remove | Remove an app or service from allowing incoming connections. Certain shared services can connect through the firewall when they are turned on in Sharing settings. For additional security, you can prevent connections to these incoming services by turning off the service in Sharing settings. See Change Sharing settings. |
Automatically allow built-in software to receive incoming connections | Allow built-in apps and services that are signed by a valid certificate authority to be automatically added to the list of allowed apps, without your authorisation. |
Automatically allow downloaded signed software to receive incoming connections | Allow downloaded apps and services that are signed by a valid certificate authority to be automatically added to the list of allowed apps, without your authorisation. |
Enable stealth mode | Prevent your Mac from responding to probing requests that can be used to reveal its existence. The Mac still answers requests from authorised apps, but unauthorised requests such as ICMP (ping) get no response. |
