My e280 didn’t come with the media converter, so I downloaded it offline, and it won’t recognize my player. What do I do?

Try being very patient with it-

Open up SMC, allow it to load completely. THEN plug your player in and wait. If it doesn’t work unplug the player and try a different USB port.
I have a computer barely a year old with a decent processor and it still gets stupid slow when I first drag files onto SMC…