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CD does not boot up upon start

CD will not boot interoperating system

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What is OS and the CD/DVD disk Apple's or your own created disk?

We also need to know what your exact model is as Apple changed the optical drives.

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Try entering BIOS and look at the boot order, the CD option might not be on or could be lower in the boot order than the hard drive

Update (10/04/2018)

On a mac you Pres and hold CMD, OPT, “O” and "F"

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How do you do that on a Mac?

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Pres and hold CMD, OPT, “O” and "F"

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Jim Studley crwdns2934231:0crwdne2934231:0
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