Hi everyone, I have a 2011 iMac that I am assuming has a broken HDD but I want to be sure. I have a bootable Mavericks USB drive. It is possible that I can boot off of this drive entirely and run the OS from this flash drive right? Also, if this works and I am able to diagnose that the HDD is broken, is it possible to install the OS on the flash drive onto a different external HDD and then permanently boot from this external HDD instead of repairing the internal one? If there is a guide available, please let me know.