Hello Everyone, Unfortunately I will have to take may new iMac 5K retina to Apple store's Guinness bar on Sunday for a check up, since I am having a weird screen glitch that occur every now and then. I have few questions for those with past experience in regards to Safety and privacy issues: 1- Should I trust them with my Machine with all private stuff on it? Pictures, Documents and passwords stored in Keychain and browsers (access to my bank accounts). Specially if they asked for my password. At the end Trust is a very subjective matter 2- Would creating a new admin account just for them be sufficient and protective enough? but again, what if they for example they decided to have it replaced? 3- Would just deleting all private information, clearing the passwords from browsers be good enough? but again, I do not know how to secure my keychain. 4- Do i have to wipe clean my hard drive and reinstall OS X ?? would it interfere with diagnostics process?? Appreciate your help.