Why can't I mount the Ubuntu 12.04 installer ISOs in Mac OS X?

Posted by eric on Ask Ubuntu See other posts from Ask Ubuntu or by eric
Published on 2012-06-20T21:25:47Z Indexed on 2012/06/21 3:25 UTC
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Over the past few days, I have downloaded both the 32 and 64 bit version of server and desktop to install on an Intel based PC.

It is normal from within OS X to double click on an ISO and it will mount the ISO in the finder as well as within disk utility.

When I attempt to mount any of the Ubuntu ISOs I downloaded, OS X returns the error message The following disk images couldn't be opened. The reason given for the error is no mountable filesystem.

However, I am still able to open the ISO directly from disk utility and burn it to a DVD/CD.

What has changed in this release to cause this? Is there something wrong with the current ISOs?

The OS X machine I am using is only two weeks old and is having no issues with any other ISO.

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