A Safari extension to send magnet links to a Transmission RPC server
Go to the latest release and download the Magnetic.safariextz file. Double click to install it in Safari.
Once installed, go to Safari > Preferences > Extensions > Magnetic, and enter
the URL of your Transmission RPC server. If you're running the Transmission Web
client, it's probably already running and you don't even realize it. It looks
something like: http://server.local:9091/transmission/rpc.
Magnetic will detect when you right-click or control-click on a magnet link and offer you a menu item to send the magnet to your server.
A regular click will give you a popup option to handle the magnet locally or send it to your specified server.