Q: Can't "get" el capitan! help!

Hi Apple sure make it hard to get el capitan. I don't see why we just can't download it like any normal file. This App Store business is a real pain in the butt.

Initially I got a message: "We could not complete your purchase. INSTALL_ERROR_DISTRIBUTION_SIGNED_BY_APPLE"

Following a clue from another discussion I opened up console and then removed a file in var/folders/etc.

Now I'm pressing "get" on the app store and NOTHING IS HAPPENING. I'm seeing a think wheel for one second and then nothing.

I definitely have enough space on the hard drive. What's happening? Please help. I've wasted enough time on this already.