I have a similar question, and I'm really kind of amazed neither of us has gotten an answer. As I write this, you have 186 views, and my question has 40 views. A lot of people without answers!
I use Little Snitch, which denies outside connections to applications/processes unless you've allowed it. When I use Tor Browser, it is trying to make connections on multiple ports, and numerous servers. Most of them seem to be using port numbers in the form: 9XXX, although there are requests on port 443. I was under the impression that the Tor Browser only used port 9150 to connect to the network, but clearly this is not the case. I've set Little Snitch to allow the Tor Browser to make any connection, since I don't know if any particular ports should be blocked. I don't know if this is a safe setting.
ETLservicemanager is a service that uses port 9001. I have no idea what it does, nor how it relates to Tor, and clearly no one else on this forum does either.
