PeakHour says UPnP can't be initialised, but I've already closed all running apps

Heads up: This article was migrated from the PeakHour 5 documentation and may contain outdated screenshots or content. We're working through updates for PeakHour 6.

For PeakHour to be able to auto-detect UPnP devices, it must be able to listen to a special broadcast port on your network (1900/udp). Only one app can be listening to this port open at a given time. In some cases, other applications keep the port open, even though they aren’t running.

If you get this error that UPnP can’t be initialized and you have no running apps, check the following:

• If you run Elgato EyeTV, try opening EyeTV > Preferences > Sharing and disable the option** Share my EyeTV Archive.**

• If you’re running the** Sonos Controller** app, close it.

If you’re not running either of those apps, issue the following command in Terminal to reveal the app which has the port open:

sudo lsof -i -P | grep :1900

This should show output similar to below:

PeakHour  70655       userid    7u  IPv4 0x2b5d2afa8b1a76ed      0t0    UDP *:1900

The name of the app which has the port open is the first column (In the example above, it is PeakHour).

Try quitting the named app and relaunching PeakHour.