Screens Express is a free utility app that grants a trusted party access to your Mac via a unique and temporary link. It ensures that the required services are configured and running properly on your Mac and configures your router so that your Mac can be accessed remotely.
You can close the connection anytime you wish.
Note: Screens Express requires OS X 10.8 Mountain Lion or later.
On the Mac you will be connecting to, download the app by clicking on this link: https://edovia.com/screens-express/latest
Then, simply double-click on the Screens Express icon to launch the app.Required Service and Settings Validation
Screens Express will verify that the required settings are properly configured. If that is not the case, you will need to grant Screens Express permission to make those changes for you. Screens Express will restore those settings back to their initial state when you close Screens Express.
Once the service and settings validation is complete, Screens Express will communicate with your router in order to open a public port, which will allow a remote incoming connection from Screens to go directly to your Mac. This port will be closed as soon as you close the app.
If for some reason the operation is not successful, Screens Express will let you know. In most cases, this error most likely means that your router either does not support UPnP/NAT Port Mapping or that the service is disabled. For more information, visit the Troubleshooting section.
Once the operation is complete, Screens Express will generate a unique link, which can be shared with the person who wish to connect to your Mac. You can choose to change that link every time you use Screens Express or make that link the same on each use.
Click the Share button to get a list of options in order to share that link.
The person receiving that link can then tap or click on that link, which will automatically open Screens and initiate a connection to the Mac.
Until a connection has been made, Screens Express is in wait mode. When an incoming connection has been detected, you will be prompted to allow the remote guest connection to continue. Click on Share Screen to let the connection go through.
From this point, the person has access to your Mac like he or she would be sitting in front of it.Closing the Connection
To close the connection, you can either Quit the app or click the Close button if you wish to close the connection but keep Screens Express running.
If you choose to close the connection, the app will need your permission to perform this action.
If you quit the app Screens Express will then close the port on your router and set things back to the way they were before you ran the app.
Screens Express was designed to only operate when it is running and will not run in the background. If you close Screens Express, your sharable link will become invalid until you launch the app again.Internet Connection
Make sure that your Mac is connected to a network and that it has access to the Internet.Grant Screens Express The Permission To Perform Some Actions
When prompted by Screens Express, please enter your password so it can apply temporary changes on your behalf.
Screens Express never gets your user credentials. It will only receive the confirmation that you are allowing it to perform some operations.Accept Screen Sharing Requests
When prompted, click on Share Screen to let the connection go through.
Configure Your Router Properly
Screens Express needs to open a public port on your router in order to make your Mac accessible remotely and does so through UPnP or NAT Port Mapping. In this example, we demonstrate how to enable NAT Port Mapping on your Apple router.
If you have a different router, then please refer to your router's documentation or perform a search on Google through this form:
For more information on which routers are supported, please consult this article.