Impossible to mount a disk image

Hello world

It is impossible for me to get any new or old picture disc.

That is to say: all of a sudden none of all the files on my disk *.dmg can be opened.

Anywhere on internet I can find a solution to this problem.

Would you be kind enough to help me with this?

Thank you much in advance :-)

The only way I have seen that it fixed is to go into Recovery Mode and reinstall OSX.

Tags: Mac OS & System Software

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