For a Mac:
(Standalone) SlingPlayer for OS X:
With the Option key held down, View -> Show Statistics Window
Watch on Slingbox.com:
With the Control and Shift keys held down, double-click the video stream itself
With the Control key held down (or right-click), click the video stream itself and select "Video Info"
All that being said, I believe that TCP streaming is the only way a Mac can connect. I've been behind firewalls where the same Slingbox works on a PC but not on a Mac (via Watch on Slingbox.com).
Thanks so much for your helpful post.
While I couldn't find the streaming format by clicking as you suggested, your different directions spurred me on to experiment, and I found that, on my MacBook Pro using OS X 10.6.8, in Watch on Slingbox.com, holding the Option + Shift and clicking in the picture brought up the information I was looking for, so you have my gratitude.
However, my problems continue, and I have just described them in a different post. Now that I know that both of my Slingbox Pros are streaming Relay, and one can be viewed on my Slingcatcher, while the other cannot, I am at a total loss. If you can again point me in the right direction, I would be ever so grateful. The new post is titled: Multiple problems streaming to a Slingcatcher.