After migration of an iPhoto file I recieved the message that the created file was damaged because the utility has made the file to an unknown date.
This is a very crypted message and don't know what to do.The message says furher to move the created Photos file to the trash!
Other 8 migrations show no problems.
G. Bakker
iMac, OS X Yosemite (10.10), MacBook Pro, iPad2, iPhone4s