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Can OS X Lion be uninstalled?

343 Views 6 Replies Latest reply: Jul 30, 2011 5:23 PM by Moms90 RSS
Moms90 Calculating status...
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Jul 29, 2011 6:34 PM

I hate this new upgrade.  Downloads and Preview doesn't work the same for me.  Can I uninstall it w/o causing damage to my previous Snow Leopard OS X system?

  • Kappy Level 10 Level 10 (221,215 points)
    Currently Being Moderated
    Jul 29, 2011 6:36 PM (in response to Moms90)

    Downgrade Lion to Snow Leopard


    1.  Boot from your Snow Leopard Installer Disc. After the installer loads select your language and click on the Continue button.  When the menu bar appears select Disk Utility from the Utilities menu.


    2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area.  If it does not say "Verified" then the drive is failing or has failed and will need replacing.  SMART info will not be reported  on external drives. Otherwise, click on the Partition tab in the DU main window.


    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.


    4. Quit DU and return to the installer. Install Snow Leopard.


    This will erase the whole drive so be sure to backup your files if you don't have a backup already. If you have performed a TM backup using Lion be aware that you cannot restore from that backup in Snow Leopard. I suggest you make a separate backup using Carbon Copy Cloner 3.4.1.

  • Allan Eckert Level 8 Level 8 (39,585 points)
    Currently Being Moderated
    Jul 30, 2011 2:14 PM (in response to Moms90)

    Maybe if you tell us exactly what about Preview and Downloads are not working for you, we might be able offer you some solutions to make the situation better for you.



  • Kappy Level 10 Level 10 (221,215 points)
    Currently Being Moderated
    Jul 30, 2011 4:56 PM (in response to Moms90)

    Save As has been removed because of the automatic save and versioning. Use the Duplicate option in order to create a duplicate file. Use the Save option to save it under a different name.


    The Go To Folder option from the Finder's Go menu has always required a path to the desired folder. If you wish to go to the Pictures folder, for example, you have to enter /Users/yourusername/Pictures/ in the dialog unless you are already in the Home folder.


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