First we'll need to show hidden files: Link here
From file explorer navigate to "C:\Users\<your_username>\AppData\Roaming\mnm"
Now create the file "mineum.conf"
nano /Users/<your_username>/Library/"Application Support"/.mnm/mineum.conf
server = 1
daemon = 1
rpcuser = "your username" //RPC username for external wallet connection
rpcpassword = "your password" //RPC password for external wallet connection
addnodes = "ip address" //Add nodes to the wallet