Having updated to OS X Yosemite, iPhoto is now gone and I cannot access my photo library. How can I get my photos back after the update? I have looked in the Users/Sam/Pictures folder where there used to be a file called iPhoto library, but that no longer exists. Instead there is a Photos Library, but that is empty. Where have all my photos gone that were stored in iPhoto and how can I recover them? I have no backup before the update, so I cannot use that to restore lost photos; I will just have to hope that they are still on there somewhere... Please help me Apple community!