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Port Range	Protocol	Service/Protocol Name	RFC	Service Name	Used By
22	TCP	Secure Shell (SSH), SSH File Transfer Protocol (SFTP), Secure Copy (SCP)	4253	ssh	Xcode Server (hosted and remote Git+SSH; remote SVN+SSH)
25	TCP	Simple Mail Transfer Protocol (SMTP)	5321	smtp	Mail (sending email); iCloud Mail (sending email)
53	TCP/UDP	Domain Name System (DNS)	1034	domain	—
80	TCP	Hypertext Transfer Protocol (HTTP)	2616	http	World Wide Web, FaceTime, iMessage, iCloud, Maps, Apple Music, iTunes Store, Podcasts, Mac App Store, Backup, Calendar, WebDAV, AirPlay, macOS Internet Recovery, Xcode Server (Xcode app, hosted and remote Git HTTP, remote SVN HTTP)
88	TCP	Kerberos	4120	kerberos	Kerberos, including Screen Sharing authentication
110	TCP	Post Office Protocol (POP3), Authenticated Post Office Protocol (APOP)	1939	pop3	Mail (receiving email)
123	UDP	Network Time Protocol (NTP)	1305	ntp	Date & Time preferences, network time server synchronization, Apple TV network time server sync
137	UDP	Windows Internet Naming Service (WINS)	—	netbios-ns	—
138	UDP	NETBIOS Datagram Service	—	netbios-dgm	Windows Datagram Service, Windows Network Neighborhood
139	TCP	Server Message Block (SMB)	—	netbios-ssn	File sharing and Windows print services
143	TCP	Internet Message Access Protocol (IMAP)	3501	imap	Mail (receiving email)
192	UDP	OSU Network Monitoring System	—	osu-nms	AirPort Base Station PPP status or discovery (certain configurations), AirPort Admin Utility, AirPort Express Assistant
389	TCP	Lightweight Directory Access Protocol (LDAP)	4511	ldap	Apps that look up addresses, such as Mail and Address Book
443	TCP	Secure Sockets Layer (SSL or HTTPS)	2818	https	TLS websites, iTunes Store, Software Update, Spotlight Suggestions, Mac App Store, Maps, FaceTime, Game Center, iCloud authentication and DAV Services (Contacts, Calendars, Bookmarks), iCloud backup and apps (Calendars, Contacts, Find My iPhone, Find My Friends, Mail, iMessage, Documents & Photo Stream), iCloud Key Value Store (KVS), AirPlay, macOS Internet Recovery, Dictation, Siri, Xcode Server (hosted and remote Git HTTPS, remote SVN HTTPS, Apple Developer registration), Push notifications (if necessary)
445	TCP	Microsoft SMB Domain Server	—	microsoft-ds	—
465	TCP	Message Submission for Mail (Authenticated SMTP)	smtp (legacy)	smtp	Mail (sending mail)
500	UDP	Wi-Fi Calling	5996	IKEv2	Wi-Fi Calling
515	TCP	Line Printer (LPR), Line Printer Daemon (LPD)	—	printer	Printing to a network printer, Printer Sharing in macOS
548	TCP	Apple Filing Protocol (AFP) over TCP	—	afpovertcp	AppleShare, Personal File Sharing, Apple File Service
554	TCP/UDP	Real Time Streaming Protocol (RTSP)	2326	rtsp	AirPlay, streaming media players
587	TCP	Message Submission for Mail (Authenticated SMTP)	4409	submission	Mail (sending mail), iCloud Mail (SMTP authentication)
631	TCP	Internet Printing Protocol (IPP)	2910	ipp	macOS Printer Sharing, printing to many common printers
636	TCP	Secure LDAP	—	ldaps	—
749	TCP/UDP	Kerberos 5 admin/changepw	—	kerberos-adm	—
993	TCP	Mail IMAP SSL	—	imaps	iCloud Mail (SSL IMAP)
995	TCP/UDP	Mail POP SSL	—	pop3s	—
1900	UDP	SSDP	—	ssdp	Bonjour
2197	TCP	Apple Push Notification Service (APNS)	—	—	Push notifications
3031	TCP/UDP	Remote AppleEvents	—	eppc	Program Linking, Remote Apple Events
3283	TCP/UDP	Apple Remote Desktop and Classroom	—	net-assistant, classroom	Apple Remote Desktop
3284	TCP	Classroom File Transfer	—	classroom	Classroom app (document sharing)
3285	TCP	Classroom	—	classroom	Classroom
3478–3497	UDP	—	—	nat-stun-port - ipether232port	FaceTime, Game Center
3689	TCP	Digital Audio Access Protocol (DAAP)	—	daap	iTunes Music Sharing, AirPlay
3690	TCP/UDP	Subversion	—	svn	Xcode Server (anonymous remote SVN)
4398	UDP	—	—	—	Game Center
4500	UDP	Wi-Fi Calling	5996	IKEv2	Wi-Fi Calling
5100	TCP	—	—	socalia	macOS camera and scanner sharing
5223	TCP	Apple Push Notification Service (APNS)	—	—	iCloud DAV Services (Contacts, Calendars, Bookmarks), Push Notifications, FaceTime, iMessage, Game Center, Photo Stream
5228	TCP	—	—	—	Spotlight Suggestions, Siri
5297	TCP	—	—	—	Messages (local traffic)
5350	UDP	NAT Port Mapping Protocol Announcements	—	—	Bonjour
5351	UDP	NAT Port Mapping Protocol	—	nat-pmp	Bonjour
5353	UDP	Multicast DNS (MDNS)	3927	mdns	Bonjour, AirPlay, Home Sharing, Printer Discovery
5900	TCP	Remote Framebuffer	6143	rfb	Apple Remote Desktop, Screen Sharing
5900	UDP	Remote Framebuffer, Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)	—	—	Apple Remote Desktop, Screen Sharing
5901–5902	UDP	Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)	—	—	Apple Remote Desktop, Screen Sharing
8000–8999	TCP	—	—	irdmi	Web service, iTunes Radio streams
9100	TCP	Printing	—	—	Printing to certain network printers
9418	TCP/UDP	git pack transfer	—	git	Xcode Server (remote git)
16384–16403	UDP	Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)	—	connected, —	Messages (Audio RTP, RTCP; Video RTP, RTCP)
16384–16387	UDP	Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)	—	connected, —	FaceTime, Game Center
16393–16402	UDP	—	—	—	FaceTime, Game Center
16403–16472	UDP	Real-Time Transport Protocol (RTP), Real-Time Control Protocol (RTCP)	—	—	Game Center
42000–42999	TCP	—	—	—	iTunes Radio streams
49152–65535	TCP	Xsan	—	—	Xsan Filesystem Access

https://support.apple.com/en-us/103229