reset Photo App
Have migrated iPhoto (Test)Library to Photo App
Try to migrate (real) iPhoto Library. System refuses.
Need to reset Photo App. (with alt-click /choose app) no success
iMac, OS X 10.11
Thanks very much for the reply, good feeling to find users who care to help!
As to my problem: I succeeded by pure luck, as follows. I have an iPhoto Library (on a Mac OS 10.9) with ca. 33000 pictures. . copied it to an external harddisk. (Took several hours). Then I connected the harddisk to my other iMac (OS 13).
There I openend Photos, holding down the alt-key, then choosing the iPhoto library on the harddisk. Took again several hours, looked good at first..., then the mac hung up. Tried it once more, same 'result', no success. (That's when I wrote the note). The next day I copied the old iPhoto Library once more, to another external harddisk, repeating the process a described - and surprise - it worked !
Good luck and thanks, Hans
