My MBP Retina 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)?
How to backup and restore MBP hard drive before reinstalling OS X
backupdisk-utilityhard driverestore
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Best Answer
Absolutely - this is a good plan in general - having a bootable backup in addition to a Time Machine interval backup.
I like to get a SD card / micro SD card and install an emergency boot OS with just enough tools to fix any situation.
I would do that before making any changes. Next, you will want to measure how large your drive is - open Apple Menu - about this Mac and look in storage:
For this Mac, you would need 185 GB of space.