Fresh Install of El Capitan

Discussion in 'OS X El Capitan (10.11)' started by aksoy80, Sep 30, 2015.

  1. aksoy80 macrumors newbie

    Joined:
    Jul 20, 2015
    Location:
    Turkey
    #1
    Hello,
    I am fairly new OS X user so I did a lot of install, uninstalls and changed many things on the Yosemite. So I would like to to do a fresh install of El Capitan once it's released. What will be my best option to do it?
    Regards.
     
  2. chabig macrumors 68040

    Joined:
    Sep 6, 2002
    #2
    You'll lose all of your tweaks if you clean install. But if that's what you want, just back up your disk to an external. Then reboot to the recovery partition, use disk utility to erase the internal drive, and install El Cap. On your first boot, you'll be asked during setup if you want to migrate from another machine. Choose yes, and take the applications and data from the external disk.
     
  3. aksoy80 thread starter macrumors newbie

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    Jul 20, 2015
    Location:
    Turkey
    #3
    thanks for the reply. Is this method called internet recovery?
     
  4. chabig macrumors 68040

    Joined:
    Sep 6, 2002
    #4
    Not exactly. There is a hidden partition on your hard drive with enough of an OS to boot the machine. Internet recovery is when that partition doesn't exist and the machine actually boots over the internet. You could take the hard drive out and it would still boot.
     
  5. definitive macrumors 68000

    definitive

    Joined:
    Aug 4, 2008
    #5
    This is how I do a clean install of a new OSX:

    -Backup my documents
    -Download it through the App Store
    -Use DiskMaker X to create an installer USB drive
    -Boot off of the USB, erase the old OSX partition, install new OSX, and configure it
    -Install the applications
    -Test to make sure they all launch, save, and close correctly
    -Restore documents from backup

    On a SSD, this usually takes up to two hours. I usually don't bother backing up apps/app and system settings (unless it's something very specific), because sometimes things can go wrong, and then I'll be scratching my head, wondering why things are crashing or working slow.
     
  6. aksoy80 thread starter macrumors newbie

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    Jul 20, 2015
    Location:
    Turkey
  7. mattburley7 macrumors 68020

    Joined:
    Oct 13, 2011
    #7
    how long does it typically take to do a fresh install of el capitan? for those who ran the GM version
     
  8. skiabox macrumors member

    Joined:
    Jul 27, 2010
    #8
    How can I download it somewhere (for doing a clean install) since there is only an install button at the app store?
     
  9. The.316 macrumors 65816

    The.316

    Joined:
    Jul 14, 2010
    Location:
    25100 GR
    #9
    This is what I pretty much do. I back up all my documents, pics, and music. Ill clean install, then reinstall apps, and then my stuff, after everything seems to be ready to go.

    Does anyone know if we need to run any 3rd party software for SSDs again, for TRIM? I remember reading that the new OS will support TRIM on 3rd party SSDs.
     
  10. deany macrumors 68020

    deany

    Joined:
    Sep 16, 2012
    Location:
    North Wales
    #10
    can someone add a poll to this thread please

    upgrade...or

    fresh install

    would really appreciate it, cheers
     
  11. KALLT macrumors 601

    Joined:
    Sep 23, 2008
    #11
    It will not actually install it, it will download an installer that opens after the download is complete. There are instructions for creating a boot image from this from previous years, just do a web search.

    Honestly though, just back up your data, let the installer create/update the recovery partition, reboot into Recovery and wipe your main partition and install Capitan again from the recovery partition. There is no particular reason why you would need to do this from a USB in this case (just a bit quicker), as the complete installer is already on your recovery partition.
     
  12. SymptomFinger macrumors newbie

    Joined:
    Nov 2, 2013
    #12
    Is there an advantage to using the USB method over the recovery method?
     
  13. skiabox macrumors member

    Joined:
    Jul 27, 2010
    #13
    Thank you so much for the information.
    But I am a little confused.
    Can I do a clean install without a usb drive?
    Is it possible?
    I don't want to keep previous applications or settings.
    I am asking because all my web searching about clean install returned the usb drive method.
     
  14. definitive macrumors 68000

    definitive

    Joined:
    Aug 4, 2008
    #14
    It's just quicker in my opinion (if you have a spare USB drive). In case something goes wrong during installation, and you have to reinstall, then you don't have to wait to redownload it.
     
  15. KALLT macrumors 601

    Joined:
    Sep 23, 2008
    #15
    There is a hidden partition on your hard drive, called Recovery. When you reboot your Mac and press the command + R keys before and until the Apple logo appears, your Mac will boot into that partition. From there you can wipe the main partition on which OS X is installed and install OS X directly from this recovery system. It is still a clean install, because your system needs to be installed from scratch. When you do this from a USB drive then the installer will still create the same recovery partition for you in addition to a clean install of the system. When you launch the El Capitan installer after downloading, it will first update the Recovery partition with the installer files for El Capitan. After that it will automatically reboot into the recovery partition and kickstart the installation. Instead you can just boot into Recovery yourself.
     
  16. jphjph macrumors newbie

    jphjph

    Joined:
    Sep 30, 2015
    Location:
    London
    #16
    If I do a fresh USB install can I restore my photos and music from a previous Time Machine backup, they are all backed up to iCloud but would save me having to download 60GB of data.
     
  17. skiabox macrumors member

    Joined:
    Jul 27, 2010
    #17
    So I should let the installer start the installation and only interfere after the first restart by pressing command + R ?
     

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