4 Replies Latest reply: Jan 3, 2013 9:21 AM by Wy-MacWinTech
Rebeca_Marie Level 1 (0 points)

i just got this disc today from s good friend, why wont it let me install..? my current software is version 10.4.11 and im trying to install 10.5.4

iMac, Mac OS X (10.4.11)
  • babowa Level 7 (29,930 points)

    If that is not a full retail disk, but an install disk from another Mac, it will not work. Install disks are machine specific. Can you post a screenshot of the disk so we can have a look? If it is grey, it's a machine specific disk.

  • den.thed Level 7 (25,950 points)

    Because you can not use the system disc from another Mac. To upgrade your Mac to 10.5, you must use a Retail Leopard or Snow Leopard Upgrade Disc.

  • noondaywitch Level 6 (8,135 points)

    You'll need a Leopard retail install disk.


    Leopard retail.png


    This info is provided by TexasMacMan, with updates from me;


    Mac OS X 10.5 Leopard installation system requirements



    Leopard is no longer available at the Apple Store but may be available by calling Apple Phone Sales @ 1-800-MY-APPLE (1-800-692-7753). {Note - this is now very unlikely, but no harm in asking}.


    If you can't obtain a retail install DVD from Apple, look on Amazon MP, eBay or Google the installer part numbers to possibly find at an on-line store. Here's what to look for:


    MB427Z/A  Leopard 10.5.1 install DVD

    MB576Z/A  Leopard 10.5.4 install DVD

    MB021Z/A , MC094Z/A  Leopard 10.5.6 install DVD (single user)

    MB022Z/A , MC095Z/A Leopard 10.5.6 install DVD (5-user family pack)

    {the bold order numbers are the later ones}


    Installing Mac OS X 10.5 Leopard



    Mac OS X 10.5 Leopard Installation and Setup Guide



    After you install the base 10.5, download & install the 10.5.8 combo update at http://support.apple.com/downloads/Mac_OS_X_10_5_8_Combo_Update

    {This is still available on Support Downloads}

  • Wy-MacWinTech Level 1 (0 points)

    Very good information.  Just wanted to add that I confirmed 12/2012 that Apple no longer sells OS X Leopard 10.5 via phone sales.  They only have Snow Leopard now.