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Install OS X to a different volume without reboot.


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It is still possible in Leopard to install OS X to a different volume to the active one without rebooting.


I keep a backup copy of my retail disk on an external drive. Booting and installing from this is lightening quick.

My disc image is on /volumes/OSX/Leopard/

So the installer OSinstall.mpkg is on /volumes/OSX/Leopard/System/Installation/Packages/

This is hidden, but can be opened with the terminal using

open /volumes/OSX/Leopard/System/Installtion/Packages/

You make an alias from this to wherever you want, mount the drive and away you go.


It IS also possible to UPGRADE a different volume. Using Pacifist, open a upgrade pkg then choose install to another volume.


Easy really...


This way you can keep, modify and restore OS X installations from within OS X itself without the need for space hogging backups and buggy time machine.


Also, if you want to modify your install disc to include updates before you install, you can add them to your backed-up disc image /system/installation/packages/updates/.

This is especially useful for AMD installations that require modified packages to install safely.




p.s. MOD: Please move this to guides section!

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