I am just bought a Retina MBP with 10.8 pre-installed, the problem is when I want to do a fresh OS re-install, I use the default install mechanism by press the CMD+R during the boot and select online install, but it take me more than 12 hours to download and still not finished yet. I understand this might due to the poor network speed and also apple does not built-in a good multi-thread download mechanism. I am start think about the possibility of use some download tools to download the MacOS10.8 offline and then build a 10.8 installer on USB, then use the USB to install the OS. My question is: How can I find the original install dmg file? There are some article in the internet says you can download it from app-store. So I log-in into the app-store, click the OSX10.8. It's seems the app-store does not recognise I am already a legal user for the 10.8 and still ask me to pay for it. Anyother way instead of keep waiting for another 24 hours? Thanks!