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... is damaged and can't be opend.

MacBook Air - MacRumors Forums - forums.macrumors.com
If i open any file it doesn't matter which kind of file, it will always tell me that it's damaged and can't be opend. I already tried to reboot my laptop a few times but that doesn't fix the problem. And now comes the funny part, if i open a file within a program let's say preview it does open. And then i trie to open it just by double clicking on in and it says again that it is damaged. How can i fix this problem??

I have a Mackbook air running Mac OS High Sierra 10.13.2

 


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