External USB CD Drive Installing Mac OSX

[Ryne]

I am trying to install mac osx, with a external usb cd drive. But it isn't working. When I click install it says "Click the button below to restart your computer and begin the installation process." Then I click it and it says "An Error Occurred. Startup Disk was unable to select the install CD as the startup disk. (-2)" What can I do to install this?

[Ryne]

Oh yea, and I tried holding down the options key, but nothing happened, except a folder with a question mark in it, then it flashed into a folder. But then once that happened it just started up regularly.

[awulf]

try holding down the 'C' key when you turn the computer on.

[MacBandit]

You can't boot from many external drives.

[Ryne]

Holding 'c' does nothing.

[MacBandit]

Originally posted by Ryne
Holding 'c' does nothing.

In that case I am pretty positive the problem is that you can not boot from the external drive you have and therefore can not install from it.