“You bring your Mac to the Apple Store!” is probably the answer Apple would give you. There might also be a way for you to put the installer on some drive. (Th

“You bring your Mac to the Apple Store!” is probably the answer Apple would give you. There might also be a way for you to put the installer on some drive. (There currently is one with the Developers Preview. It works just like the dmgs of older OS X discs and you can find it inside the App bundle of the installer you download in the App Store.)