Fitting new hard drive on 2012 MBP, how do I get OSX onto it?

Discussion in 'OS X Mountain Lion (10.8)' started by aircanman, Aug 12, 2013.

  1. macrumors 6502

    Joined:
    Feb 2, 2011
    Location:
    UK
    #1
    As title really, as I have no boot disc or usb drive, how will I get my OS back on the new hard drive? Does the mac have a feature to download the os?
     
  2. macrumors 68000

    sonicrobby

    Joined:
    Apr 24, 2013
    Location:
    New Orleans
    #2
    When you turn the mac on and it makes the sound/white screen, hold the "option" key on the keyboard, you can load it from there
     
  3. thread starter macrumors 6502

    Joined:
    Feb 2, 2011
    Location:
    UK
    #3
    When you say load it, the drive will be blank, how does the mac get hold of the software to load onto the drive?
     
  4. macrumors P6

    Weaselboy

    Joined:
    Jan 23, 2005
    #4
    Yes. If you install a blank drive, just do a command-option-r boot to Internet Recovery. That will DL a recovery screen where you can use Disk Utility to format the new drive to Mac OS Extended. After that quit Disk Util and click install OS and the 4.7GB OS will DL and install. All this is over the Internet, so it can take some time depending on your Internet speed.

    If you want to avoid the DL and speed things up, just attach and external USB drive and make a Time Machine backup. Then once the new drive is installed you can option key boot to the backup, format the new drive, then click restore. This will be much faster as you do not need to DL everything again. It will also put back all you apps and data etc. IMO this is the preferred method.
     
  5. macrumors 68000

    sonicrobby

    Joined:
    Apr 24, 2013
    Location:
    New Orleans
    #5
    Its sort of built into the computer itself, not the HDD. I cant explain it. Read Weasel's post, its much more descriptive :p
     
  6. thread starter macrumors 6502

    Joined:
    Feb 2, 2011
    Location:
    UK
    #6
    Excellent I have a time machine backup all ready to go, so this will copy everything needed on my mac.
     
  7. macrumors P6

    Weaselboy

    Joined:
    Jan 23, 2005
    #7
    Yep. You can test it now if you want. Plug in the TM drive and option key boot. You will see the orange USB TM drive in a list of available boot devices.

    Sounds like you were already good to go and just did not realize it. :)
     
  8. thread starter macrumors 6502

    Joined:
    Feb 2, 2011
    Location:
    UK
    #8
    For some reason my googling was coming across people who had upgraded from Lion to ML with the download, and either using a mounted usb or ext hdd, which was not answering the question!

    Thanks for the info peeps.
     
  9. thread starter macrumors 6502

    Joined:
    Feb 2, 2011
    Location:
    UK
    #9
    Just wanna say thanks to people who offered me advice with this, it was as simple as fitting the new drive, then plugging in the time machine disk, instantly I was greeted with the utilities window so I could format then reinstall everything, so seamless and this is what makes apple the best!
     

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