I had same problem when I tried to upgrade using the Safari on iPad. I would suggest try to upgrade on a different tool (phone, computer, iPad, etc). Once I have paid for the course, I had no problem accessing the materials on iPad, iPhone, or Mac.
@chinobonito Which browser are you using? You could try the free Chrome extension "Download Master" which allows you to download multiple links on a page. This worked for me and others (Mac and PC).
@kingofclubs323 I was just able to load and watch the entire video with no problems (running Chrome Version 41.0.2272.89 (64-bit) on Mac OSX Yosemite). No freezing, etc. My home internet is pretty robust—it might be a network issue.
... schools are compatible with both mac & windows so it doesnt ... . Laptop wise im a big mac fan, like it way more ... shell out the $ on a Mac but are hesitant I probably ...
... save you all from the Mac spec vs. PC spec ... I didn't have a Mac in undergrad because I couldn ... mentioned, Excel on a Mac is literally the worst thing ... my main reason for thinking Mac was reliability and customer ... mind that a lot of Mac users seem to get. ...