I bought my MacBook Pro from someone else. It was my first Mac, and I didn't realize then that any apps he downloaded and installed from the app store would forever after need his Apple ID and pw to update. So, I merrily used the already installed iPhoto, uploaded all my photos, and ignored the update notifications for iPhoto, since I didn't have his pw... Now, I have installed Yosemite, and the old version of iPhoto will not work. Any ideas of what I can do? I am most concerned with saving my photos. Thoughts I have had: * Uninstall iPhoto and reinstall it with my ID... But, if I do this, will I be able to access my photos, or will they be uninstalled with the old program... or, will I not be able to import to the newly installed iPhoto because they were uploaded originally to a new iPhoto? * Contact the guy and see if he'll give me his pw so I can update iPhoto, then somehow save my photos somewhere, uninstall it to get rid of his ID, then reinstall it with my ID. But then again, will I be able to access my photos? I'm still a Mac newbie, and really miss the ease of photo filing/access on windows explorer. I can see the iPhoto library in Finder, but of course, can't access them without iPhoto. Thanks in advance for your patience and help.