mac系统共享服务无法打开

就在前几天，我的一台老的mac突然无法共享文件了，网上找了很多方法，都不行，原来苹果也是有bug的啊，好不容易找到一个，很好使，希望帮到你

I actually found the attached thread useful by manually turning on file sharing using TERMINAL.

Enable and disable file sharing from term… - Apple Community

Here's my synopsis:

Close system Preferences (If open)
Open Terminal
Paste: sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.AppleFileServer.plist and press [Enter]
Type your computer password (Typing will not show, do it anyway) and press [Enter]
Paste: sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.smbd.plist and press [Enter]
Type exit and press [Enter]
Once the process finishes, close the Terminal window.
Open System Preferences and go to Sharing
DONE!
I was having this same exact problem with my Mac Mini running Catalina 10.15.7 and this fixed it!

Now my Mac Mini shows it's shared folders on my Macbook Pro running High Sierra 10.13.6!