So i thought it would have been a good idea to zip my parent iphoto library off there imac to an external hard drive thinking i would just be able to unzip it after i did a fresh osx yosemite install. It made the transfer allot faster because it sees one big file instead of thousands of little files. But now that i have the fresh yosemite installed i can't seem to unzip the iphoto library. Can somebody help me. My moms about to freak if the files are lost. heres the error im getting.