I think your port is probably open, but you don’t have anything that listens on it.
The Apple Mac OS X operating system has SSH installed by default but
the SSH daemon is not enabled. This means you can’t login remotely or
do remote copies until you enable it.To enable it, go to ‘System Preferences’. Under ‘Internet & Networking’ there is a ‘Sharing’ icon. Run that. In the list
that appears, check the ‘Remote Login’ option. In OS X Yosemite and up, there is no longer an ‘Internet & Networking’ menu; it was moved to Accounts. The Sharing menu now has its own icon on the main System Preferences menu. (thx @AstroCB)This starts the SSH daemon immediately and you can remotely login
using your username. The ‘Sharing’ window shows at the bottom the name
and IP address to use. You can also find this out using ‘whoami’ and
‘ifconfig’ from the Terminal application.
These instructions are copied from Enable SSH in Mac OS X, but I wanted to make sure they won’t go away and to provide quick access.