> For the complete documentation index, see [llms.txt](https://edovia-1.gitbook.io/screens-connect-for-macos/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://edovia-1.gitbook.io/screens-connect-for-macos/troubleshooting.md).

# Troubleshooting

## **UPnP, NAT-PMP, or Port Mapping is Disabled or Unavailable on the Router**

First, confirm that your router supports UPnP (also called *NAT-PMP* or simply *port mapping*). Refer to your hardware documentation to learn how to activate this feature. If UPnP is not available on your router, you must perform a [manual configuration](/screens-connect-for-macos/settings/manual-configuration.md).

If you have more than one router on the same network, confirm that one of them is set to *Bridge Mode* and that all of them support UPnP. (Note that some modems also act as routers.)

Some manufacturers advertise their hardware as UPnP- or NAT-PMP-compatible, but some routers use buggy UPnP implementations. If you seem to be experiencing issues with your router's automatic configuration, try mapping the port [manually](/screens-connect-for-macos/settings/manual-configuration.md).

## **Port Mapping Failed**

Try restarting your router and computer. If this doesn't seem to help, it's possible that your router doesn't support UPnP. If this is the case, you must map the port [manually](https://guides.edovia.com/screens-connect/manual-configuration) or use [another method](/screens-connect-for-macos/alternative-method.md) (other than *Screens Connect*) to make your Mac remotely accessible.