# csshX > Cluster SSH tool for MacOS. > More information: . - Connect to multiple hosts: `csshX {{hostname1}} {{hostname2}}` - Connect to multiple hosts with a given SSH key: `csshX {{user@hostname1}} {{user@hostname2}} '--ssh_args' '-i {{path/to/ssh_key.pem}}'` - Connect to a pre-defined cluster from /etc/clusters: `csshX cluster1`