Hi, I really want to do a clean install of Mavericks, this is for a few reasons. 1. I have purchased a Creative Cloud subscription and need to remove all the rubbish Adobe has installed. I now use app cleaner but before that I would just bin the app so there are some rogue files. 2 My late 2012 iMac has been getting noticeable slower. 3. I need to change my username/ home folder name. This one was made a few years ago when I got my first mac and is annoying me a bit. My question is : Is the only way to clean install to create a bootable USB and transfer just the data ( I want to re install apps manually) from either time machine or copy them to a usb 3 external and copy them back? Thanks.