Apple has already released a fix for its embarrassing privilege escalation bug. If you haven’t already, open the App Store, go to Updates, and install Security Update 2017-001. However, after installing that you may notice that file sharing no longer works. In order to fix this problem you need to perform the following steps:
- Open the Terminal app, which is in the Utilities folder of your Applications folder.
sudo /usr/libexec/configureLocalKDCand press Return.
- Enter your administrator password and press Return.
- Quit the Terminal app.
In conclusion High Sierra is still a steaming pile of shit and you should stick to Sierra if you can.