Backup Question?

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I have 10.4 how can I create a backup of my disk image (is this the hardrive with everything on?) so I can put it on my external FireWire harddrive and then boot from it if I want? I would like to be able to boot from it by pressing option while starting.

Thanksy
 

chscag

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Your Mac's Specs
2017 27" iMac, 10.5" iPad Pro, iPhone 8, iPhone 11, iPhone 12 Mini, Numerous iPods, Monterey
You need cloning software. Either SuperDuper (shareware) or Carbon Copy Cloner (donation ware) are able to clone the contents of your hard drive to an external drive and make it bootable.

Regards.
 

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