Reinstalled OS X another two times from recovery mode, which seemed to
go through fine, shut off Wifi before final restart, - same result boot
hanging at 50%. I am out of ideas. ...and in a bad pinch: not been able
to use my computer since three days...
I too am stuck at 50% of the boot loading bar. After installation of
Yosemity, my 2009 MacBook Pro got stuck at 50% on the progress bar
during the subsequent first automatic reboot. I haven't been able to
make it to the login screen once since the 'u...
