The photo library needs to be upgraded to work with this version of iPhoto
Hi, I transferred my iPhoto library to an external hard drive, checked and double checked it was there on HD.
Now when I open iPhoto library from HD, or by opening iPhoto by icon, the file says zero bytes! on file.
Message says
"The photo library needs to be upgraded to work with this version of iPhoto.
Your photo library will not be readable by previous versions of iPhoto after the upgrade. The upgrade process for very large libraries may take an hour or more to complete."
What has happened? will the upgrade be ok for my photos? don't know what it needs by "previous versions"
all I did was transfer iPhoto, why do they make it so hard?
MacBook Air (13-inch Mid 2013), OS X Mavericks (10.9.5)