hello
same problem here- my (pretty old) eyetv-sat works perfectly with my macbook pro (late2012), but does not with my new iMac (late2015)- as far as i understood all relevant postings, it seems, that apple has changed something around the usb-stack and therefore i do not have much hope, that geniatech will get this problem solved- i really liked watching tv while working on my iMac and therefore i am really disappointed, about this...nevertheless i/we have to accept, that neither apple nor geniatech are very interested to get this old device to run on new machines....
i am watching sat-tv at the moment via an virtual-windows7 on my iMac- a rather poor workaround, i know, but it works at least as long as the computer is not going into sleep-mode- when waked up after a break, terratec-cinema does not work until i power off/on the eyetv-sat device...then it runs almost perfect until the next sleep....
...so schaut's aus!
rgds
ajw