Apple Platform Security
- Welcome
- Intro to Apple platform security
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- Encryption and Data Protection overview
- Passcodes and passwords
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- Data Protection overview
- Data Protection
- Data Protection classes
- Keybags for Data Protection
- Protecting keys in alternate boot modes
- Protecting user data in the face of attack
- Sealed Key Protection (SKP)
- Activating data connections securely in iOS and iPadOS
- Role of Apple File System
- Keychain data protection
- Digital signing and encryption
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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 in the Security & Privacy pane of System Preferences and supports the following configurations:
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.
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