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  1. #1


    Member Since
    Oct 09, 2011
    Posts
    3
    XP to Lion on imac
    hi all

    ive aquired an old iMac from my dad as im intrested in app development, but he had Windows XP installed on it.

    ive bought OSX lion on USB thumb drive, without realising you are meant to upgrade from previous version of OSX

    i was hoping i could boot from the the USB and install from there.

    he doesnt have any original disk so i cant restore.

    how do i get OSX lion on this iMac

    thanks in advance

  2. #2


    Member Since
    May 19, 2009
    Location
    Charlotte, NC
    Posts
    152
    Specs:
    Mac Mini, i5, SSD & 1TB, 8 GB
    The iMac should boot from the USB drive. Then install from there.
    Mac Mini - 2.5 GHz i5 - 8 GB - 128 GB SSD & 1 TB HD - 2 Apple 23" LCD
    15.4" Unibody MBP - 2 MacBook Airs
    2 iPads, 3 iPhones, 3 iPods, 1 Apple TV

  3. #3


    Member Since
    Oct 09, 2011
    Posts
    3
    hmm, it just goes straight to windows.

    and i cant find a way to get to the bios to enable it to boot from usb

  4. #4


    Member Since
    May 19, 2009
    Location
    Charlotte, NC
    Posts
    152
    Specs:
    Mac Mini, i5, SSD & 1TB, 8 GB
    Hold the option key during the boot.
    Mac Mini - 2.5 GHz i5 - 8 GB - 128 GB SSD & 1 TB HD - 2 Apple 23" LCD
    15.4" Unibody MBP - 2 MacBook Airs
    2 iPads, 3 iPhones, 3 iPods, 1 Apple TV

  5. #5


    Member Since
    Oct 09, 2011
    Posts
    3
    thanks i'll try that.

  6. #6


    Member Since
    May 19, 2009
    Location
    Charlotte, NC
    Posts
    152
    Specs:
    Mac Mini, i5, SSD & 1TB, 8 GB
    Don't have to go to BIOS as the iMac does not have that. Just hold the option key during the boot cycle and then select the USB drive.
    Mac Mini - 2.5 GHz i5 - 8 GB - 128 GB SSD & 1 TB HD - 2 Apple 23" LCD
    15.4" Unibody MBP - 2 MacBook Airs
    2 iPads, 3 iPhones, 3 iPods, 1 Apple TV

  7. #7


    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    20,911
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    When you say "old" iMac -- how old? What model?

    How do we know it's even capable of running Lion?

  8. #8

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,932
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    Quote Originally Posted by chas_m View Post
    When you say "old" iMac -- how old? What model?

    How do we know it's even capable of running Lion?
    That actually is a good point. With XP you can't give us all the specs, but what Mac is this? Is it Intel or old Power PC? Lion will only install on a Core2Duo CPU or higher.

  9. #9

    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,880
    Specs:
    27" iMac i7 (2011) 10.11, Mac Mini i5 (2014), iPhone6s, Apple Watch, iPad Pro 9.7, AppleTV (4)
    I'm guessing it's an intel Mac (XP wouldn't run otherwise).

    Just depends if is Core2Duo or DualCore

    Once XP is running - right-click 'My Computer' and choose 'properties' this should tell you which processor is in there and how much RAM you have
    Not been around these parts for a while. Trying to change that . .

    Please use the reputation system if you think you've been helped - bottom left of this post

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