Hello, I am taking a math class where we have to design a picture out of graphs by using any graphing app ( In my case it's Grapher) After I finished all my work I saved a file.(15.5mb) On the next day when I was trying to open my file... well, first my laptop run out of RAM... ( I have 13" Retina with 8Gb on board). Second time it's just frozen and later after doing force quit of Grapher all my icons were gone. Only reboot helps. I also attached what is going on in my activity monitor during that time. Can anybody help me to find the solution? I am sorry for my english, this is my second language. P.S. I did chat with apple support about it, they have no idea what is going on. The only thing they said that Grapher is used as a stress app for testing computers. P.S.S.I have an appointment at apple store on tuesday, hope they will help me. Thank you and Happy New Year!