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  1. #1
    Partition a drive - help needed
    Hello all,

    I am currently running Snow Leopard on my mid-2009 MacBook Pro and would like to partition a part of the drive without having to reinstall the OS on the main drive. Is this possible?

    If it is possible could I then install a more up to date version of the OS on the new partition but keep Snow Leopard on the old one? (thinking El Capitan as it seems to be the most up to ate version that will work with my machine)

    Thanks in advance for any tips.

  2. #2
    Partition a drive - help needed
    Slydude's Avatar
    Member Since
    Nov 16, 2009
    North Louisiana, USA
    Your Mac's Specs
    2.8 GHz 2008 MacBook Pro 10.11, 8 GB mem, iPhone XS, 2015 iMac 16 GB 10.14.4 beta
    Rep Power
    I think the following setup will get you where you want to go:
    1. Create a backup of your current Snow Leopard installation. It's probably be a bootable clone should something go wrong.
    2. Download Diskmaker X
    3. Download the El Capitan installer but do not complete the installation yet. If you do the installer gets deleted from your hard drive when the installation is done.
    4. Use Diskmaker X to make the el Capitaninstaller. You'll need a hard drive or about an 8 GB Flash drive.
    4. Boot the computer by holding down the Option key and launching from the El Capitan drive you created.
    5. Launch Disk Utility and create the partition for El Capitan. Now finish the El Capitan installation.
    “Hard work beats talent when talent fails to work hard.”
    Kevin Durant

  3. #3
    Partition a drive - help needed
    lclev's Avatar
    Member Since
    Jul 24, 2013
    Ohio (USA)
    Your Mac's Specs
    2017 13" MBPro, 2010 MacPro, iPhone Xs Max
    Rep Power
    Give this article a read it may help:

    Recommend using Onyx to clean your Mac.
    If you have been helped, please add to their reputation by clicking on the icon in the lower left hand corner of the post.

  4. #4
    Partition a drive - help needed
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 7+, iPhone 8, Numerous iPods, Mojave
    Rep Power
    Nice find Lisa and that will work for the OP. However, we need to let other folks know who are running later versions of OS X and the newer version of Disk Utility, the method shown in the article may no longer work. Always make a cloned backup of your hard drive before attempting any kind of work on the drive. Safety first!

  5. #5
    Partition a drive - help needed
    Rod's Avatar
    Member Since
    Jun 12, 2011
    Melbourne, Australia and Ubud, Bali, Indonesia
    Your Mac's Specs
    2015 MacBook Pro Retina 13" macOSX 10.15.1
    Rep Power
    Hi OliB, Welcome to Mac-Forums.
    Cloning first is definitely the way to go here. It's worth bearing in mind that Carbon Copy Cloner and SuperDuper both offer free fully functional trials so for a one off process like this the only outlay may be a large USB HD. Mind you I'm sure once you appreciate the advantages of a bootable clone you will be happy to shell out the cost of the registered version. CCC is available for download here
    I used to be conceited but now I'm perfect.

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