Thought I p[osted yesterday. Got more info today. MacBook Pro 2011-2013. HDD crashed (Bad sectors) couldn't recover any data. Installed new hard drive first attempted to install Sierra via USB, stopped at 50% then went to a gray screen after reboot.
Pressed Options Command +R, went into Downloading Internet recovery, completed then went back to the gray screen. Read that I would need to install Yosemite first. stopped at 50% again. Rebooted pressed the Option Command and received the attached files. REALLY need someone's HELP HERE
Question
HBELP!!!! MacBook Pro Stuck at 50% Loading Yosemite
+1
+16Have you tried resetting the PRAM?
+12Yes, I had a whole lab of macs do this...resetting NVRAM brought them back....
https://support.apple.com/en-us/HT204063
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