• https://progressstory.com/tech/port-5000-already-in-use-macos-monterey-issue/
• https://medium.com/pythonistas/port-5000-already-in-use-macos-monterey-issue-d86b02edd36c

  Overview

  MacOS Monterey (version 12) is the 18th and current major release of macOS. The successor to macOS Big Sur, it was announced at WWDC 2021 on June 7, 2021, and was officially released on October 25, 2021. Every update of Macintosh comes with some surprises and nightmares.
  In this blog, I’m not talking about all the good thing that has been introduced in the new release but will be talking about one thing that is super annoying for every developer. This new version of macOS has “hijacked our cute little port — 5000“ from us.

解决方案：

取消勾选 隔空播放接收器，就可以了（Uncheck Airplay Receiver）