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Mac Thread, How to install an OS from a .dmg without burning it? in Technical; I have a .dmg image of OSX Server I want to install, but I dont have a dual layer DVD-R ...
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    How to install an OS from a .dmg without burning it?

    I have a .dmg image of OSX Server I want to install, but I dont have a dual layer DVD-R to burn it to
    Theres a few suggestions here
    which seem to say that if you put the .dmg on another partition or extract it there, you can boot from that partition as if its a CD

    How do I do that?
    Ive tried just copying the image to the partition, and also mounting it in OSX and then copying it to the partition, but when I boot and hold the option key, the only partition it lets me boot from is the one with OSX on it, not the one with the .dmg

    Is this possible? What am I doing wrong?

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    SYNACK's Avatar
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    Doubt that this will help but if you already have a mac server floating around you should be able to make it boot the image over the network:

    http://images.apple.com/ca/fr/server...t_TB_final.pdf

    There may be a way to do this from another mac as well but I don't know.

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    I suspect it is possible but I don't know how to do it so not going to attempt advice google might tell you.... Might be easier just to buy a blank dvd?

    Jona

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    This a way to configure a Linux server to support netboot.

    https://www.math.ohio-state.edu/wiki..._with_isc_dhcp

    Edit: Had a better look at this, it is very involved, I'd buy the DVD-DL as opposed to this option.
    Last edited by SYNACK; 18th April 2008 at 12:13 PM.

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    You need to use disk utility to burn the dmg as a partition to an external drive (eg ipod), copying/mounting the file will not work. I have done this for leopard but it should be the same for Server. Its pretty easy, think of it like burning an iso to a DVD

    Installing Leopard From DMG gWHIZ
    Last edited by somabc; 18th April 2008 at 12:38 PM.

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    Quote Originally Posted by sidewinder View Post
    I have a .dmg image of OSX Server I want to install, but I dont have a dual layer DVD-R to burn it to
    Theres a few suggestions here
    which seem to say that if you put the .dmg on another partition or extract it there, you can boot from that partition as if its a CD

    How do I do that?
    Ive tried just copying the image to the partition, and also mounting it in OSX and then copying it to the partition, but when I boot and hold the option key, the only partition it lets me boot from is the one with OSX on it, not the one with the .dmg

    Is this possible? What am I doing wrong?
    If you have a DMG image of OS X Server then you can *restore* this image using Disk Utility to a partition on an external drive that is set as a GUID Partition (in other words an Intel Mac can boot from it). There is a good process for doing this in easy steps here:

    How to Install Leopard from External Firewire Hard Drive at iUseApple

    HTH

    Paul

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    Sorted now, installing as we speak
    restored it to a partition on a firewire disk
    Thanks guys

    I love Macs for stuff like this, makes it much easier

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