Hi guys, As my early 2011 MBP was slightly sluggish I decided on performing a clean install of El Capitan and searched numerous websites via Google on how to do this. I followed exactly as instructed on the website stated: http://mashable.com/2015/10/01/clean-install-os-x-el-capitan/#z1XPQqNTREqY However, I was expecting to have to reinstall ALL my apps via the App Store, but strangely, after reinstall many if not all the apps were already there. So it has left me feeling that I have not performed a proper clean install. I want to redo another clean install, however, i would be grateful if you guys can confirm whether the information from the link is complete or whether something is missing. Alternatively, can you provide me full details / instructions how to perform a clean install. Any help will be very much appreciated.