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Mac Pro suddenly not recognizing discs

by runcapher / September 28, 2010 1:15 AM PDT

Hi all. Hopefully this is the correct place to post my question. Yesterday I inserted a movie DVD into the internal drive of my MacPro 3,1 and received the error message, "The disc you inserted is not readable by this computer". I tried several different movie discs, some old, some new releases I just purchased and I get the same message. Data discs work fine but not movie DVDs.

I also noticed that my Mac can no longer mount an ISO or DMG file. I get an error saying "No Mountable filesystems". I have repaired permissions, restarted, disconnected all external peripherals, etc. Pretty much all the basic stuff you try when your Mac isn't behaving as you'd expect. The odd thing is that it just started behaving this way within the last two days. DVDs played fine before and I could mount any ISO or DMG file. Only thing that is different is I ran the most recent security update from Apple when it popped up. Would welcome your thoughts, suggestions, etc.

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That MacPro.
by mrmacfixit Forum moderator / September 28, 2010 5:29 AM PDT

Boot from the Restore disks or from an OS X installation disk and run Disk Utility and Repair Disk.
If all is well, and the problem still exists, consider the following:
1. Delete the Finder Preferences. You will find them in your Home Folder>Library>Preferences. Just drag it to the desktop and reboot.
2. Archive and Install of the System using the OS X installation disk.


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Thank you!
by runcapher / September 28, 2010 5:33 AM PDT
In reply to: That MacPro.

I'll give it a try. Thanks for the post. Will let you know how I make out.

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Problem still exists
by runcapher / September 28, 2010 10:18 PM PDT
In reply to: That MacPro.

Well, tried all of the suggestions provided and still cannot get my MacPro to mount a movie disc. I really think it must be software related because movie discs will not mount in my internal SuperDrive or the two external Sony DVD writers. Any other thoughts?

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(NT) Even after performing suggestion #2?
by mrmacfixit Forum moderator / September 28, 2010 10:57 PM PDT
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