recovery:apple.com/support 501-0F?
recovery error:apple.com/support 501-0F
I know this has been covered elsewhere but after connecting an Ethernet cable I don't get this error but I end up with a blank grey screen after it fills in the Internet recovery bar. Getting nowhere trying to re-install 10.13.4
Mac Pro, OS X Yosemite (10.10.5), 22 GB RAM