My MBP Retina 13"13″ late 2012 is showing the stop sign and I know that I need to reinstall my OS. I have not got my hard drive backed up with Time Machine. Is there a way in which I can backup my hard drive to an external drive using Disk Utility and then restore it back once I have reinstalled the OS (I have to restore as for some reason I don't have enough space or something)?
Any help appreciated.