I'd like to use Back to My Mac, between two of my Macs, a Mac Pro (trash can) and a Macbook Pro 2011. When I go a finder of my Macbook Pro and look in the shared section, I can't see my Mac Pro. When I click on details of Back to My Mac in iCloud settings I get this error... "Back to My Mac may be slow because NAT Port Mapping (NAT-PMP) or Universal Plug and Play (UPnP) is turned off on your router. Turn on NAT-PMP or UPnP." I have a Timecapsule that I use my router. I've gone into the settings and and added my apple ID in the Back to My Mac section. It has a green light in the status". I've also gone into my Sky (UK) modem/router settings and made sure UPnP is turned on. For some reason that I don't understand, when Sky installed my Fibre they also put in a BT Openreach box. I don't know how to access this box's setting. Is there anything I need to do on the Macbook Pro to get the Mac Pro to show up?? Any other advice on how to get this working would be appreciated!