My beloved Lenovo notebook actually is gone for repair due to some hardware trouble – so I am stuck with a not-so-beloved mac. For working I do need a sshd daemon running, which is – hooray – shipped per default. You just need to activate it:
Go to System settings, look for ‘Sharing’. There’s a Tab named ‘Services’ which allows you to check a box saying ‘Remote Login’. That’s it – and we’re up and running.