Just a quick tip if you're running into issues with SMB shares in macOS High Sierra. I was running into issues with my HP All-in-One Printer/Scanner and saving files to a network share on macOS. Apparently HP does not have SMB up-to-date in their firmware, so if you have strict signing or SMB protocol v3 setup, you need to downgrade it.
You can do that with the following set of shell commands:
sudo scutil --prefs com.apple.smb.server.plist
The following is in an interactive shell:
get / d.add ProtocolVersionMap 2 set / commit apply quit
Then run the following to restart the service:
sudo /usr/libexec/configureLocalKDC sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.smbd.plist sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.smbd.plist
You may also need to have the File Sharing service restart on every boot if it doesn't seem to take effect. You can do that by creating this Property List file:
sudo nano /Library/LaunchDaemons/com.me.restart_smb.plist
With these contents:
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Label</key> <string>com.me.restart_smb</string> <key>ProgramArguments</key> <array> <string>/bin/bash</string> <string>-c</string> <string>sleep 60;touch "/Library/Preferences/SystemConfiguration/com.apple.smb.server.plist"</string> </array> <key>RunAtLoad</key> <true /> </dict> </plist>
And then setting the permissions on that file:
sudo chown root:wheel com.me.restart_smb.plist sudo chmod 644 com.me.restart_smb.plist
Hope that helps!