Welcome bellssn690, always good to see a Mac user
, you'll defiantly get the best out of Oolite with that set-up.
Oolite is a game based on the original Elite, and has the same flavour, it has however evolved (and is still doing so) into an even better experience. Check out the OXP's which you can use to tailor your Ooniverse with, but stick to the eye-candy at first, some can change the game and make it very difficult for an inexperienced pilot.
I can't help you with the download issue - just checked and I'm getting 260KB/sec (which is maxing out my connection) so it suggests your problem lies somewhere between the server and your computer.
Good luck commander.
through the galaxy since... .