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Booting from a USB drive
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Fresh-Faced Recruit
Join Date: Apr 2004
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Can anyone with a new MacBook check if it is possible to boot off a USB drive?
Thanks.
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Mac Elite
Join Date: May 2005
Location: West LA
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pretty sure you cant boot off anything USB. Apple made it so that it firewire is the only bootable port.
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Fresh-Faced Recruit
Join Date: Apr 2004
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Well, I figured that since Apple is now using EFI, and the iPod no longer supports FireWire, that it might be possible to boot off a USB drive.
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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Well, AGP-based Macs that can boot OS 9 can boot OS 9 from USB -- but not OS X. If anything, the limitation is in OS X, not in the hardware.
tooki
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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AFAIK the chipset supports USB booting (I have the previous generation, and it supports USB booting), but Apple doesn't support it with their firmware or software.
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Admin Emeritus Join Date: Oct 1999
Location: Zurich, Switzerland
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I don't think we have any reason to believe the firmware (or hardware) doesn't support USB booting, considering that both AGP Macs and the Intel EFI chips do it, and we know for a fact that on OS 9-bootable Macs, it is only Mac OS X that is preventing it.
tooki
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Mac Elite
Join Date: Apr 2000
Location: Los Angeles, CA
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According to the developer documentation, we should now be able to. The key is that the external drive must be formatted using the newer GUID partioning table (GPT) scheme.
By default, internal hard drives on Intel-based Macintosh computers use the GUID Partition Table (GPT) scheme and external drives use the Apple Partition Map (APM) partition scheme. To create an external USB or FireWire disk that can boot an Intel-based Macintosh computer, select the GPT disk partition scheme option using Apple Disk Utility. Starting up an Intel-based Macintosh using an APM disk is not supported.
I don't have an Intel-based Mac to test this, but I'm hoping others do. :-)
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Fresh-Faced Recruit
Join Date: Dec 2002
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Thanks for posting this piece from the developer materials. Definitely interesting for those of use planning the transition from G4 to Mac-Intel.
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Forum Regular
Join Date: Feb 2006
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Admin Emeritus Join Date: Oct 1999
Location: Zurich, Switzerland
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That's a FireWire thumb drive, not USB. We already know that booting from FireWire is possible.
tooki
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Forum Regular
Join Date: Feb 2006
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