I did an nmap scan for my private IP address

nmap -p- 192.168.1.123

and got the following open ports back:

50323/tcp open  unknown
50334/tcp open  unknown
50641/tcp open  unknown
57621/tcp open  unknown
57650/tcp open  unknown
64448/tcp open  unknown

A more detailed scan about those specific ports also didn't yield much.

nmap -p 64448,57650,57621,50641,50334,50323 -A 192.168.1.123

PORT      STATE SERVICE    VERSION
50323/tcp open  unknown
50334/tcp open  unknown
| fingerprint-strings:
|   NULL:
|_    {"type":"Tier1","version":"1.0"}
50641/tcp open  tcpwrapped
57621/tcp open  unknown
57650/tcp open  tcpwrapped
64448/tcp open  tcpwrapped

I'm fairly confident that I'm not responsible for opening them. They're most likely there because Apple uses them for services.

I wanted to know what they do, so I'd know if I should disable them or not for security purposes. However, googling the port names gave nothing. So, I think we should give a short description about each port and the corresponding service, so that others will be easily able to find this information in the future.