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  1. #1
    Custom Install, Essential System Software

    Member Since
    Dec 17, 2011
    Posts
    6
    Custom Install, Essential System Software
    Snow Leopard
    Dmg Size: 6.13 GB
    Essential System Software: 3.6 GB
    Essential System Software: 8.12 GB (after erase the disk with Disk Utility)

    1. Can someone explain, where the difference of GB come from?

    ------------------
    Lion
    Dmg Size: 3.49 GB (without Printers, Developer Tools, Fonts..)

    2. Can I clean the disk for proper install or does it require Snow Leopard System files?
    I installed it on cleaned disk. Filesystem and storage management were low.

  2. #2
    Custom Install, Essential System Software
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,018
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Well SL comes on a DVD and not a .dmg file. You need to boot from the SL DVD, pop it in and restart, immediately after the chime hold down 'C', leave Installer and go to Utilities > Disk Utility > Erase Disk, format Mac OS Extended and in Partition select GUID.

    Then back to Installer and proceed. If you downloaded SL which is against EULA, then a .dmg is always much smaller that the opened file.
    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!

  3. #3
    Custom Install, Essential System Software

    Member Since
    Dec 17, 2011
    Posts
    6
    sry, you misunderstand my question

    I've tested it on same Model, MacBook Late 2008. USB install, the source file was the same.

    without "erase disk" 3.81 GB


    with "erase disk"
    8.12 GB (german)

  4. #4
    Custom Install, Essential System Software
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,018
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Sounds like you are illegally installing if it is from USB and not a full retail install DVD.
    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!

  5. #5
    Custom Install, Essential System Software

    Member Since
    Dec 17, 2011
    Posts
    6
    You can install all Mac OS from USB, why should it be illegal? I could download the dmg files from Education Server of my school. Or you can backup your DVDs to dmg.

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