Hey Guys, I just downloaded OS X Mavericks onto my laptop and before installing it into my laptop, I copied the package contents so that I can install it onto my iMac without having to re-download the entire new OS. BUT.... I am stuck as to how to install in into my iMac now, it looks quite different to Mountain Lion whereas it was just clicking an "Install OS X" (or around those lines) file. Can anyone help me with this? Really want to get Mavericks on my iMac. I have read about making a bootable USB drive and just boot from the drive when i restart my computer. Will this just upgrade my system keeping all my installed apps and what not, or does it delete everything and install the new OS? Thanks in advanced guys!!!