Migrate iPhoto library to Photo
I tried importing my iPhoto library with Photo, and while the system recognised the file, and started to open, the process stalled and I was told 'failed.' When I retried, after copying the iPhoto library to an external disk it also failed and said it does not have permissions. There is no password on the disk. I have multiple libraries to import. What to do?
MacBook Pro (15-inch Mid 2012), OS X Yosemite (10.10.4)