After talking with others, I'm dropping the whole ActionTec MoCA interest ….
… and going for a simple Ethernet switch device, and running inexpensive Cat6 RJ45 cable from the iMac/Modem location to the Apple TV, across the house. Too much trouble, time consuming, and potential headaches wiring in and justifying the cost of the ActionTec's MoCA adapters. No doubt would have hours of trouble getting the MoCA adapters up and running. Besides, also read some bad reviews on Amazon about ActionTec Tech Support, and ActionTec MoCA adapter reliability over time.
The KeeBox SGE05 5-Port 10/100/1000Mbps Gigabit Ethernet Switch (below/at Amazon), should do the trick …. along with picking up about 40'-50' of inexpensive Cat6 RJ45 cable. I'll just be running it along the same internet cable line TimeWarner put in to my iMac & Internet Modem.
KeeBox SGE05 5-Port 10/100/1000Mbps Gigabit Ethernet Switch
http://www.keebox.com/products/productdetail.asp?prod=100_SGE05&cat=80
Standard Cat6 RJ45 Ethernet Cable (All Colors)
http://www.amazon.com/Cat6-Networking-Ethernet-Patch-Cable/dp/B00BEX6218/ref=sr_ 1_3?s=electronics&ie=UTF8&qid=1428283894…
Found Everywhere (All Colors)
So for around $25 bucks total, versus $125.00 (+/-) for (2) MoCA Adapters ….. and a 15-30 minutes installing the CAT6 cable along the same TimeWarner Internet cable line from my iMac…. I'd be done!
Sometime "keeping it simple" (KISS) is still the best method.