How To Check Which Ports Are Open Mac?
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To check which ports are open on your Mac, you can use the command line utility “netstat.” To use netstat, open the Terminal application and then type the following command:
netstat –an | grep LISTEN
This will list all ports that are listening for connections. You can also filter the output by protocol; for example, to check which ports are open just for TCP connections, type the following command:
netstat –an | grep LISTEN | grep tcp.