Remote access via screen sharing app
There are two parts to remote sharing your Mac computer: software on the computer and configuration of your network.

Software on your Mac

You can use the built-in VNC server on your Mac; there is no need for third party software.


Launch System Preferences and open Sharing.
Select Screen Sharing then click Computer Settings.
Finally, enable VNC viewers and provide a secure password.


Next, test you can access and control your Mac using a VNC client within your home network. This can be done from a Mac, Windows, or mobile device using a VNC client.

Configure your network

To access your Mac from outside of your home network, you need to open a port for VNC:


port: 5900
protocol: TCP
direct the incoming traffic to your Mac


If this port is not open and passing traffic to your Mac, then you will not be able to connect from outside your network.

How you configure your modem/router differs between the make and model of each device. Some routers will have built-in assistants to help set this up.