Boris50: Thanks kharris, seems so easy and I assume that is what he is doing. All fine until Netflix error! I'll tell him to make sure Unotelly definitely still good on the Mac in case IP address changed, and double check he's entering correct DNS in ATV. He's quite tech savvy so I can't understand why the problems!
Get him to try on a free trial of getflix too... just in case.
Each time he changes the netflix region he will have to restart the netflix app. i.e. exit the app and log in again.
Also, on ATV it is sometimes difficult to tell which region you are linked too.
When he eventually does get in that is.
The other way to do it is to change the DNS on his router, which is a good solution for some people. Remembering that all traffic will be affected by that (but the lag is usually minor)