New to TiVO: Can I watch recorded shows on my Mac?

I've just ordered the refurbished Roamio DVR (not the pro) from the Summer for a wonderful $49. I figure it's a good way to to start off in TiVO world while waiting for new equipment in future.

I travel a little for work so I was wondering if I could watch recorded programs on my MacBook w/o the Stream box? I know you need the Stream to watch on iOS but I don't need that as long as I can watch on my laptop. Just wondering if this is something I will need to purchase as well.

Also, on the TiVO Mini for the 2nd TV - you can connect via COAX cable OR Ethernet, right? I have a COAX cable line in the bedroom but only have WiFi, not Ethernet in there.

Thank you for your help. I'm looking forward to getting rid of my FiOS DVR!