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I'm having a difficult time installing Ubuntu in my macbook, It's a Macbook White Late 2007 model with Snow Leopard, without a working disk drive so I tried installing via USB (also following instructions specific for Macs).

I've partitioned a 100gb for Ubuntu and installed refind. However Ubuntu refuses and gives me this error message:

"The firmware refuses to boot from the selected volume. Note the external hard drives are not well supported by Apple's firmware for legacy OS booting."

error message

I appreciate the help, thanks in advance!

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Try to create a special USB boot, as mentioned here. You might be able to get more help from the Ubuntu forums, as that's where the link will take you. –  Chan-Ho Suh May 30 '13 at 19:26
Also, take a look at this. It mentions that after installing rEFInd, you need to move some files to your USB. Did you do that step? –  Chan-Ho Suh May 30 '13 at 19:30
Thanks for the tips! I'll check them out and report back! –  Isa Jun 7 '13 at 9:50
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