syncthing

brew install syncthing

Start on boot

Do this if you want syncthing to start without having to login in. It is useful on headless servers. This will start the syncthing daemon when your computer boots.

Create a new system LaunchDaemon plist file using sudo:

sudo vi /Library/LaunchDaemons/com.syncthing.syncthing.plist

Paste the following configuration into the file, replacing USERNAME with your output from whoami and /opt/homebrew/bin/syncthing with your output from which syncthing:

<?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.syncthing.syncthing</string>
    <key>UserName</key>
    <string>USERNAME</string>
    <key>GroupName</key>
    <string>staff</string>
    <key>ProgramArguments</key>
    <array>
        <string>/opt/homebrew/bin/syncthing</string>
        <string>serve</string>
        <string>--no-browser</string>
        <string>--no-restart</string>
    </array>
    <key>EnvironmentVariables</key>
    <dict>
        <key>HOME</key>
        <string>/Users/USERNAME</string>
    </dict>
    <key>RunAtLoad</key>
    <true/>
    <key>KeepAlive</key>
    <true/>
    <key>WorkingDirectory</key>
    <string>/Users/USERNAME</string>
    <key>StandardOutPath</key>
    <string>/opt/homebrew/var/log/syncthing/syncthing.log</string>
    <key>StandardErrorPath</key>
    <string>/opt/homebrew/var/log/syncthing/syncthing-err.log</string>
</dict>
</plist>

Ensure standard system file permissions on the plist file:

sudo chown root:wheel /Library/LaunchDaemons/com.syncthing.syncthing.plist
sudo chmod 644 /Library/LaunchDaemons/com.syncthing.syncthing.plist

Load and enable the daemon:

sudo launchctl bootstrap system /Library/LaunchDaemons/com.syncthing.syncthing.plist

See the web interface

open http://127.0.0.1:8384

Check status

sudo launchctl print system/com.syncthing.syncthing

To disable

sudo launchctl bootout system /Library/LaunchDaemons/com.syncthing.syncthing.plist

Sharing device and folder

See device id

syncthing cli show system | jq .myID

Share device on both local and remote

# On remote
syncthing cli config devices add --device-id $LocalID
# On local
syncthing cli config devices add --device-id $RemoteID

Add a folder on local

FolderID=`dd if=/dev/urandom count=1024 2> /dev/null | sha1sum --quiet`
syncthing cli config folders add --label LABEL --path FOLDER --id $FolderID 

Share folder to remote

syncthing cli config folders $FolderID devices add --device-id $RemoteID

On remote, check pending invitation

syncthing cli show pending folders

On remote, add folder and share it back

syncthing cli config folders add --id $FolderID --label LABEL --path FOLDER
syncthing cli config folders $FolderID devices add --device-id $LocalID