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Original effort to download new version of High Sierra resulted in an error message and invitation to try again. When I did so, the screen went blank and a flashing file symbol with a question mark appeared.even after restart, that,s all I can get.
MacBook Pro with Retina display
Boot into Recovery http://support.apple.com/kb/HT4718 and try again.
Boot into Recovery http://support.apple.com/kb/HT4718 and try again.
question mark symbol when trying to download HighSierra
