How share Photos library on the same Mac without iCloud
Hi,
I have an iMac, with El Capitan OS X 10.11.4
I have an iCloud account but I use Photos on my iMac without iCloud, only local.
I have create a second account on my iMac for my wife. She hasn't an iCloud account.
I want to share my Photos library with her.
I have moved my Photos library in the shared directory, and I have give the read/write authorization on it for my wife.
For me it's ok when I open Photos, but for my wife, when she tried to open this Photos library there's an error message about broken permissions, and it's impossible to do something, there's no option, just Quit :-(
It's possible or not to do this ?
If yes, how to do ?
Regards.
iMac, OS X El Capitan (10.11.4)