My photos on iPhoto are ruined and are cut in half, how can I fix it?
I recently updated my entire macbook, which is very common for macbook users. Anyways, I was looking through my photos in the iPhoto app and saw that a lot of my photos were ruined and cut in half in all directions. The photos show only half of the image. At first I thought it was a one time thing so I logged off and logged back on, I even restarted the computer and updated the macbook again. It didn't change at all. I have not a single clue what is the cause of this. I've never had a virus on my macbook before so I don't know if it is a virus or not. Nothing out of the ordinary happened other than the fact that my photos are ruined. I've owned my macbook for just over two years... I've also tried to rebuild my iPhoto library but nothing has changed as well...
About My Mac:
OS X Yosemite
Version 10.10.5
Macbook Pro (13inch, mid 2012)
Processor 2.9 GHz Intel Core i7
Memory 8 GB 1600 MHz DDR3
Graphics Intel HD Graphics 4000 1024 MB
203.04 GB free of 748.93 GB
I have no idea how to fix my pictures, somebody please help me. Any information, advice and tips would be very much appreciated as I'm sort of panicking since I don't have a back up of any of my photos.
MacBook Pro (13-inch Mid 2012), OS X Yosemite (10.10.5)