11-18-2014, 11:17 PM
modelamac wrote:
When installing Yosemite or Mavericks, a Recovery Disk is installed. That is the first step when installing Mav/Yosemite, I believe, so it should be there and available on the problem Mac. It's the replacement for the OS on a DVD.
To get to it, hold Cmd R at the startup sound. Then chose to reinstall the OS.
...After using the copy of the Disk Utility on the Recovery volume to check SMART status, repair the drive and repair permissions.