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I have a Macbook Pro 4,1 It has a 64 bit Intel chipset. I download Ubuntu-11.10-amd-64.iso

I have verified that macbook iso md5sum and the cd boots to the live CD mode too. The installation completes upto 60% and then fails with the following dialog.

Ubuntu Install Fail

I am not sure if this a problem with CD has I have tried a couple of times and it has failed with a different CD at a different point in time.

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I think it is CD error. You better go to Ubuntu forum at this link for apple users support. – Ravi Apr 15 '12 at 6:40
It is not a CD error. I seem to have tried 3 attempts with different CDs and 1 dvd. – Senthil Kumaran Apr 15 '12 at 9:33
Then try what Chan-Ho Suh suggested. – Ravi Apr 15 '12 at 15:19

Try installing using the mac iso. There are a couple versions for 11.10 here depending on what kind of install you want.

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Thanks, I have started the CD Download and I going to try this. – Senthil Kumaran Apr 15 '12 at 15:22
Unfortunately gave the same error to me. Either it could my CD writing problem or problem with mac hd. – Senthil Kumaran Apr 16 '12 at 12:04
I'm sorry to hear that. Try the Ubuntu forums and look for the MacBook Pro 4,1 threads. There tends to be a lot more info there on Mac related stuff than here. – Chan-Ho Suh Apr 17 '12 at 22:41

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