Apple Platform Security
- Welcome
- Intro to Apple platform security
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- System security overview
- Signed system volume security
- Secure software updates
- Operating system integrity
- Activating data connections securely
- Verifying accessories
- BlastDoor for Messages and IDS
- Lockdown Mode security
- System security for watchOS
- Random number generation
- Apple Security Research Device
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- Services security overview
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- Apple Pay security overview
- Apple Pay component security
- How Apple Pay keeps users’ purchases protected
- Payment authorization with Apple Pay
- Paying with cards using Apple Pay
- Contactless passes in Apple Pay
- Rendering cards unusable with Apple Pay
- Apple Card security
- Apple Cash security
- Tap to Pay on iPhone
- Secure Apple Messages for Business
- FaceTime security
- Glossary
- Document revision history
- Copyright
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Firewall security in macOS
macOS includes a built-in firewall to protect the Mac from network access and denial-of-service attacks. It can be configured by going to System Settings > Privacy & Security (macOS 13 or later), the Security & Privacy pane of System Preferences (macOS 12 or earlier), or by using a configuration profile with the Firewall payload installed manually or provided by an MDM solution. The following configurations are supported:
Block all incoming connections, regardless of app.
Automatically allow built-in software to receive incoming connections.
Automatically allow downloaded and signed software to receive incoming connections.
Add or deny access based on user-specified apps.
Prevent the Mac from responding to ICMP (Internet Control Message Protocol) probing and portscan requests.