please excuse my ignorance. I checked, and as you correctly state High Sierra OSX 10.13 is not in beta. Yesterday I updated my three computers to High Sierra. I also upgraded two computers to EyeTV 3 version 7520. I use the eyetv app on my ipad and iphone. Both computers streamed video to my mobile devices over my home wifi network with no problem at all.
Streaming live TV to my mobile devices over wifi is the main way I use EyeTv. I may have misunderstood the theme of this thread. when I read the messages I feared that my EyeTv set up would become useless if I upgraded to High Sierra. I took a chance and upgraded a mac mini (mid 2012) to 7520 and then High Sierra. The mac mini successfully streamed the live tv to both my mobile devices. I then repeated the process for a mac book air 11 inch 2013. This computer also successfully streamed video the my mobile devices. Under normal use I use the mac book air, my live tv screen size, on this computer is as small as possible.
As to the High Sierra crashing EyeTv when accessing the EPG in full screen mode I have no knowledge of this, I have not used the EPG (TV Guide) for many years because I am not able to get it. I usually know what programs I wish to view. If I have to look for something I use a web page called zap2it which provides a good tv guide even though it will not interface with EyeTv. While I very rarely watch EyeTv on my computer, when I do and want to change channels I use the on screen channel changer.
As I was reading the thread I assumed that high sierra had rendered EyeTv useless in its entirety. This is not the case at least for me and the way I use it. My issue is tomorrow I am upgrading to fiber optic for internet, phone and TV and have next to no idea how my EyeTv set up which I am very happy with is going to work if at all. I cant really find any information that I understand and may have purchase a TV set which brings up a whole bunch if issues.
What I can add to this thread is that like all things with computers " your milage may vary". High Sierra and 7520 work for me and the way I use EyeTv. From what is in the thread there are some issues with using the EPG and the remote, and it sucks when a product does not function fully as intended coming out of an up grade. I hope you all who are having issues can find a work around you can live with until such time as the flawsare fixed.
Again my apology for being so stupid for saying high sierra was in beta when it had not been so for morethan a month