Help with -3403F
I'm new in MAC and OS I have MAC pro laptop with El Captain OS X I wiped my internal Macintosh HD by Disk Utilities I did that because I need to learn how to reinstall a new OS now when I startup the system I get a message (appel.com/support-3403F) and I cannot get to the disk utilities again, I don't have a CD boot for any kind of OS I already did the Backup before I wipe the partition so kindly your advice
MacBook Pro, OS X El Capitan (10.11.6)