I just went in my Mac to find an app that I purchased and it appears to be gone. In fact, when I go into iTunes and the App store all of my apps are listed, but they are not clickable. They are grayed out. I have the same apps on my iPad and they are not there either. I haven't downloaded Yosemite yet because there still seems to be a lot of problems with it. Could that be the problem. I paid good money for these apps and want them back. Any help will be appreciated.