[X4U] Booting from external drive

[Michael Elliott]

Jens

Perhaps the drives aren't formatted correctly? Hard drives must be  
formatted in a particular partitioning scheme, I believe called GUID,  
to be used as boot drives on Intel Macs.  If you go into Disk Utility  
and select your drive, you can then find the option in the window (I  
can't remember where, but it's under the Erase or perhaps reformat?  
tab/button--I'm typing on my MacBook, so it's not showing up for my  
built-in hard drive, and I don't have an external hooked up).  There  
are multiple partitioning schemes, one for PPC machines.  That is why  
you can't use the hard drives you've been using unless you  
repartition them using GUID.

Once you do that, the hard drive will show up in the OSX installer as  
a valid startup disk.

Remember to back up all of your data from the external drive, as the  
process of changing the partition scheme will erase it.

Let us know if that works.

Michael


On Aug 14, 2007, at 6:02 PM, Jens Selvig wrote:

> I decided I wanted to be able to make a bootable external hard  
> drive for my MacPro. When I boot from the install CD, The Installer  
> software says I am not allowed to install on any of the Firewire  
> drives that are attached or the USB drive, either! I could install  
> OSX on the second internal SATA drive.