I wiped my 2017 MBP's drive at the direction of Apple support, to start fresh on my MacBook and try to eliminate/pinpoint a battery drain issues...now there is no bootable disk on the MPB.
I went through the procedures to download MAC OS High Sierra onto a thumb drive for use when booting the MBP...but the MBP is not recognizing the thumb drive.
When I start the MBP with Cmd-R, I get a progress bar for 2 seconds and then and error message that reads: Picture: Triangle with ! on top of a globe "apple.com/support -3403F"
How can I get this MBP booted and running when it won't connect and reinstall from internet and also refuses to recognize thumb drive with Mac OS? Help!!!