Apple Platform Security
- Welcome
- Intro to Apple Platform Security
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- System Security Overview
- Signed System Volume Security
- Secure Software Updates
- Rapid Security Responses
- Operating System Integrity
- 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

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