Cannot erase disc in disc utility before trade in Looking for some help please.
I am preparing my 2014 MacBook for a trade in. I followed the instructions that Apple sent but failed on the 'turn FileVault off' stage. I did this, but my prediction now is that at some point during the process my battery went flat as everything I'm reading implies that my disc is still encrypted.
I booted up into recovery mode to complete the Erase Hard drive and reinstall MacOS process.
Using Disc Utility I then erased the top disc it showed me - 251 GB Apple SSD SM0256F Media.
I then went to erase the 2nd disc it showed Mac OS X Base System (which shows 1.15GB used)
However I am unable to erase this in Disc Recovery. In the Erase tab the 'erase free space' / security options / erase buttons are all greyed out.
How can I erase this disc? Presumably this is what I need to reinstall MacOS as currently when I try to run reinstallation from disc recovery no disc shows in the installation dialog
Thanks so much
The Base System (&amp; the potential 20 or so tiny volumes you may be able to see below that) are part of your current Recovery session. You cannot erase them - nor do you need to. They are ephemeral &amp; will disappear once you again boot to a normal OS.
You install your new OS to the main drive, once it has been erased.