Having bought a new MacBook which had OS X Yosemite 10.10.5 already installed, I decided to upgrade to El Capitan. Two days later it finally downloaded, the RESUME button only took me back to downloading from the start. Having downloaded, it is not on my MacBook, only Yosemite. Where has it gone? How do I recover it. Tried upgrading but its from the beginning so another two days!!! Gadgetgran.