Hi all, new to this and was trying to unroot and relock bootloader using a Mac. For some reason when using this guide, I got into a nasty TWRP boot loop and can't get out. :(

The link was using Android Rootz...

I've downloaded the latest 5.1 factory images from Google. But when I'm using terminal to try to access the unzipped folder on my desktop it says "no file directory found".

Can someone please help? Thank you. Again, using a 2014 Macbook Pro.