Hey everyone... I upgraded to Mavericks about a month ago, and everything has been fine until recently. Quicktime developed some serious playback issues, both through the player and through apps like After Effects that rely on QT. Some troubleshooting has brought me to the conclusion that I need to do a clean install of Mavericks. I think I know what to do, but am maybe a five on the tech-savvy ten scale, so I want to make sure my plan is solid, plus I have a question. 1. My OS, Users and apps are on an SSD. I would clone this onto a spare usb HD using Super Duper. (I also have a usb HD with a clone of my previous MT Lion setup on it, created before I upgraded to Mavericks the first time, if that is at all helpful). 2. Reboot using Mavericks clone as startup. 3. Reformat SSD via Disk Utility 4. Clean install of Mavericks onto SSD via app store. 5. ? The part I am shaky on is, how do I migrate all my user data (app prefs, mail, etc) from the clone to the newly minted mavericks SSD, which is to be my startup? Also, can I simply drag my apps from the cloned drive back onto the SSD? I am a video pro, so a lot of my apps like After Effects have many plugins installed, and doing a clean install of the aps, plus all the plugins, is kind of a nightmare for me. Any and all help greatly appreciated!