I’ve been trying to install elementary on my mid 2010 17" mbp. I’ve created a few different flash drives using both Etcher and DD. I’ve even verified the ISO hash. No matter what media I use I wind up here after selecting the bootable usb. Google has not been helpful in figuring this out. Anyone else seen this?
The most recent release often gave me problems. Get the next one back until they clean some things up. Also I have been using Impression to write my flash drives. Give it a try.