Preview Problems - Grey and White Checked
Hey guys I have the following problem: the preview on my macbook doesn't show me pdf documents normally, but it is completely ok when i enter the mac as a Guest. The picture is down below. I had already reinstalled OS and i still have the same problem.Can anybody help me in answering how to fix it? Thanks in advance.
MacBook Air, OS X El Capitan (10.11.4)