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Message: <blockquote data-quote="Hombre" data-source="post: 552925" data-attributes="member: 44061">I've read a number of ways to do this, but so far nothing works.I have a power mac dual G5, running tiger 10.4.11 at 2.5 ghz.I am attempting to boot from a firewire driven WD Mybook, that I erased and installed tiger 10.4.11 on as a mac os extended/journaled volume.The my book WD drive shows up under system prefs as a bootable drive, but when I choose it, the G5 defaults back to the main internal drive.Holding down the option key when starting up results in nothing...the G5 won't start at all. Dittos for the command/control/shift/delete idea.I would like to be able to do this, because I want to take my work and programs from one mac location to another.Does anyone have any suggestions?</blockquote>