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  1. #1
    Lion Erase & Install

    Member Since
    Apr 21, 2012
    Posts
    13
    Lion Erase & Install
    I would like to perform a complete erase and install, but i am without install discs. I understand how to perform this task with a flash drive, but do i have to purchase lion from the app store? i did not upgrade to lion it came pre installed. I would like to erase everything on the hard drive and begin again.

  2. #2
    Lion Erase & Install
    Dysfunction's Avatar
    Member Since
    Mar 17, 2008
    Location
    Tucson, AZ
    Posts
    6,821
    Specs:
    Way... way too many specs to list.
    Hold down cmd and R at boot. This is the lion recovery method

    OS X Lion: About Lion Recovery

    prepare for a 2-3 hours of OS download once you start install after format.
    mike
    This machine kills fascists
    Got # ? phear the command line!

  3. #3
    Lion Erase & Install

    Member Since
    Apr 21, 2012
    Posts
    13
    what you explained reinstalls lion rather than erasing the hard drive. I want to simply erase & install like previous systems, must I do this another way?

  4. #4
    Lion Erase & Install
    Stretch's Avatar
    Member Since
    Jan 13, 2007
    Location
    Central New York
    Posts
    4,773
    Specs:
    15in i7 MacBook Pro, 8GB RAM, 120GB SSD, 500GB HD
    That is the method to do it. You can erase the HDD once you've booted into the Lion Recovery partition.
    Blog and Photo Gallery: http://philolin.me/

    Currently running OS X 10.10

  5. #5
    Lion Erase & Install
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,291
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    What member Dysfunction suggested to you can also be used to erase the disk and then proceed with the reinstall. Use Disk Utility from the Recovery Partition to erase the disk first.

  6. #6
    Lion Erase & Install
    Dysfunction's Avatar
    Member Since
    Mar 17, 2008
    Location
    Tucson, AZ
    Posts
    6,821
    Specs:
    Way... way too many specs to list.
    Quote Originally Posted by chscag View Post
    What member Dysfunction suggested to you can also be used to erase the disk and then proceed with the reinstall. Use Disk Utility from the Recovery Partition to erase the disk first.
    Sadly I can confirm this. I've had to do it. Then I complained when I had to bring the iMac back to the store for a physical replacement. Evidently the networked method of recovery is unpopular with more than just myself.
    mike
    This machine kills fascists
    Got # ? phear the command line!

  7. #7
    Lion Erase & Install

    Member Since
    May 08, 2012
    Posts
    26
    Lightbulb Reformat?
    Friends I am new to this particular forum and searched for my topic and found this thread.
    I have a followup question that I need an answer to: when installing/reinstalling Lion to a new drive, unformatted [but the same question I think applies to a botched install or other hard issue] - when the Erase/Install switch is invoked, does it wipe, remove partition info, and re-partition and reformat the drive? I am doing this on an iMac 20 and just trying to ascertain if I need to FIRST format the HDD before even attempting the install.
    My understanding [from article on burning lion to bootable device on lifehacker...] is that all the tools/utilities are available on the boot /install image so I assume the disk utility can be invoked to do what needs to be done??

    thank you for your help

  8. #8
    Lion Erase & Install
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,061
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    G'day and welcome to the forums.

    Erase then format Mac OS Extended (Journalled) into Partition, select single, go to Options and make sure GUID is selected, then back to Installer and proceed.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  9. #9
    Lion Erase & Install

    Member Since
    May 08, 2012
    Posts
    26
    Thumbs up
    Perfect. like a mnid-reader you gave me exactly what's needed.
    thanks so much
    c

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