You can get XCode and OS Updates through https://developer.apple.com/download/more/ https://developer.apple.com/download/more/ (you need a login, but it's free

You can get XCode and OS Updates through https://developer.apple.com/download/more/ https://developer.apple.com/download/more/ (you need a login, but it's free AFAIK). EDIT: Actually just checked, looks like there is no update for el capitan or sierra on the dev portal. Drats. My app store works on my hackintosh so I never actually had to use the dev portal anyway ^^'. I used an old mac's ID.