How to completely wipe MBP and start over?

Discussion in 'MacBook Pro' started by Humanerror, Nov 10, 2016.

  1. Humanerror macrumors newbie

    Joined:
    Nov 19, 2015
    #1
    Hello. My MBP recently has been very slow and getting the spinning wheel. I also feel like maybe there might be some virus or spyware on it even though people say Apple cannot get such things.

    Is it possible to completely wipe the MBP and start over fresh? How can I do this? And is there any new virus software for apple these days that should be ran on the system?
     
  2. MacInTO macrumors 65816

    MacInTO

    Joined:
    Apr 25, 2005
    Location:
    Canada, eh!
    #2
    Load a bootable version of OS X on a USB stick first,

    https://support.apple.com/en-ca/HT201372

    Then backup your data!!!

    Then use the USB stick to reload the OS by erasing the drive with Disk Utility and then installing a fresh copy of OS X
     
  3. andreyush macrumors 6502

    andreyush

    Joined:
    Oct 24, 2015
    #3
    I don't think your macbook have viruses. Does your macbook have a HDD?

    You can resset SMC and PRAM or you can reinstall the OS :)
     
  4. Humanerror thread starter macrumors newbie

    Joined:
    Nov 19, 2015
    #4
    I don't have any data so I don't care if anything is lost. I just want to wipe it. I also have Yosemite and wanted to upgrade to the latest OSX.
     
  5. MacInTO macrumors 65816

    MacInTO

    Joined:
    Apr 25, 2005
    Location:
    Canada, eh!
    #5
    Download a copy of Sierra, create the USB stick, erase with DU and then reload. If you only load it from the HD or SSD, it will not delete your old data.
     
  6. Humanerror thread starter macrumors newbie

    Joined:
    Nov 19, 2015
    #6
    Ok thank you will try that now.
    --- Post Merged, Nov 10, 2016 ---
    So i downloaded the MacOS sierra, put in my usb stick, went to application and tried to drag a copy of sierra into the usb and it says "The item "install macos Sierra" cant be copied because it is too large for the volumes format.

    I have 99GB available on my usb stick.
     
  7. MacInTO macrumors 65816

    MacInTO

    Joined:
    Apr 25, 2005
    Location:
    Canada, eh!
    #7
    There's no dragging involved. Only a terminal command.

    btw, your stick should be empty because it will reformat it.

     
  8. Humanerror thread starter macrumors newbie

    Joined:
    Nov 19, 2015
    #8
    Alright, will empty the stick first. But this is where I am getting stuck

    sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app

    When I type that in, should they all be spaced apart in the command? This is what the example tells me to write in.
     
  9. thekev macrumors 604

    thekev

    Joined:
    Aug 5, 2010
    #9
    Yeah. I'm not familiar with those particular flags, but the "--" items are flags, not part of your arguments. The "\" characters are there to indicate that the space is part of a name, not a break in the argument.
     
  10. Antairez macrumors regular

    Antairez

    Joined:
    Mar 17, 2015
    #10
    1. Make sure you've put
    Code:
    Install macOS Sierra.app
    inside your Applications folder
    2. Replace
    Code:
    MyVolume
    from that long-ass command to your actual volume name (You can check your volume name by running
    Code:
    ls /Volumes/
    alone)

    3. If you are not comfortable working with Terminal, or doesn't understand how to format your drive, I suggest bringing your laptop to the Apple Store.
     
  11. Humanerror thread starter macrumors newbie

    Joined:
    Nov 19, 2015
    #11
    I just figured it out! "Copying installer files to disk..." :)
    --- Post Merged, Nov 10, 2016 ---
    Disk utility is not allowing me to erase the drive. When I click on erase tab, the erase option is not highlighted and willl not let me click on it. What should I do?
     
  12. Antairez macrumors regular

    Antairez

    Joined:
    Mar 17, 2015
    #12
    I suppose you could just partition the entire drive. I really suggest you to lookup a tutorial on google or youtube, asking information piece by piece is not really promising when you are doing delicate work like reinstalling the operating system.
     
  13. MacInTO macrumors 65816

    MacInTO

    Joined:
    Apr 25, 2005
    Location:
    Canada, eh!
    #13
    Did you restart and hold the option key down? If you do that, you will see the USB and the HD. Then select the USB as the startup drive.

    It would make sense that you can't erase the drive you currently booted from.
     
  14. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #14
    This is getting overly complicated because you are trying to make this Sierra USB key. Just skip that and reinstall Yosemite then you can update to Sierra after.

    Just hold command-r at startup and you will see the recovery utility. Then start Disk Utility and erase Macintosh HD to Mac OS Extended (Journaled) format. Then quit Disk Utility and click reinstall OS X up at the top. You will be asked for the AppleID you used to download Yosemite previously. Then Yosemite will download and install.

    Once it restarts and you make your new account, go to the App Store and download Sierra and let it install the update for you. No need to mess around with a USB key.
     
  15. Fishrrman macrumors G4

    Joined:
    Feb 20, 2009
    #15
    Humanerror -

    You have "erred" again in your original post, by not telling us WHICH MacBook you have and what kind of drive is in it...
     

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