Photos was unable to repair permissions on your library
My wife and I have separate logins to our iMac. This caused us to create two separate iPhoto Libraries as we were uploading photos. I had been waiting for the Photos release to put together a common Library for us to share and be able to load to from our individual accounts.
Both iPhoto libraries were migrated to Photo. I exported all her photos from her library as 'unmodified originals' to her shared folder. Then while in my account I imported those files into my Photo's library. Then I moved my Photo Library to my shared folder. I gave my wife Read/Write permissions on the Library file.
While logged in a my wife I 'Option Clicked' on Photos and selected the shared Library from my Login and got the following error;
"An error occurred while preparing permissions. Photos was unable to repair permissions on your library."
As a test I created a new Library under my wifes Login and put it in her shared folder, and got the same error while trying to access it under my Login.
I ran disk utility and did not see any issues on the drive.
Any thoughts??
iMac, OS X Yosemite (10.10.2)