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Helpful answers
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May 17, 2015 8:40 AM in response to fayeteeby Eric Root,★HelpfulRestart holding down the option/alt key and see what OS the Recovery Partition is. If Mavericks, boot to the Recovery Volume (command - R on a restart or hold down the option/alt key during a restart and select Recovery Volume). Run Disk Utility Verify/Repair and Repair Permissions until you get no errors. Then re-install the OS.
If not Mavericks, run Disk Utility from the external, then go to the App Store and download Mavericks from the Purchases tab. Run the installer and select the internal as the install disk.
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May 17, 2015 8:37 PM in response to Eric Rootby fayetee,I don't get to see a recovery Volume upon restart, i can only see the external HD (my current start-up disk) and Macintosh HD. I selected the Macintosh HD and ran the DIsk Utility giving me an error message that Disk Utility could not repair the drive. In case Disk Utility cannot really repair my Hard drive anymore, how should i reformat the disk so i can clean install Mavericks or better so i can proceed with upgrading my OS to Yosemite?
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May 17, 2015 9:49 PM in response to fayeteeby babowa,How are you restarting?
You cannot repair the disk you are booted from, so you do need to boot from your external drive and then attempt to repair your internal drive.
If you cannot repair it, then you'd need something like Disk Warrior which may or may not be able to fix the problem and/or your hard drive is failing.
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May 18, 2015 11:38 AM in response to fayeteeby Eric Root,★HelpfulDid the repair error message suggest reformatting? Mac OS Extended (Journaled) with Option GUID is the format you want using the Erase tab. This will cause you to lose all data on the drive. I hope you have a backup.
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May 18, 2015 6:22 PM in response to Eric Rootby fayetee,Yes it did suggest reformatting. My Mac is running now, i reformatted my drive and reinstalled Mavericks. Will try upgrading to Yosemite once more, hopefully the disk error won't be a problem anymore since i already cured what was wrong by reformatting. Thank you very much for your help!
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