Moving the iPhoto library is safe and simple - quit iPhoto and drag the iPhoto library intact as a single entity to the external drive - depress the option key and launch iPhoto using the "select library" option to point to the new location on the external drive - fully test it and then trash the old library on the internal drive (test one more time prior to emptying the trash)
And be sure that the External drive is formatted Mac OS extended (journaled) (iPhoto does not work with drives with other formats) and that it is always available prior to launching iPhoto
And backup soon and often - having your iPhoto library on an external drive is not a backup and if you are using Time Machine you need to check and be sure that TM is backing up your external drive
Worked perfectly. I just have to make sure that the internal HDD is not ejected or anything which it normally wouldn't be. I also did this same thing to photobooth library and it worked the same. Is there any other files that should be defaulted to the HDD instead of the SSD? I have itunes iphoto and photobooth going to the HDD. Let me know what you think.
I recently replaced my 1TB Seagate hard drive from an Apple warranty and decided to move/keep my photos on a separate partition from OS X. I then followed your instructions about relaunching iPhoto with the ALT/OPTION key depressed and changed the default locaton. Now I've opened iPhoto and there are no photos anywhere as indicated on this enclosed
screenshot. In the past they appeared when I clicked on "Events" under LIBRARY on the left pane.
I also just tried to "Import to Library" under file but that initiated a transfer to the drive containing OS X.