How can I transfer photographs in the old iPhoto App to the new Photos App?
I wish to transfer photographs in the iPhoto App on my very old PowerBook G4 (PowerPC Mac) running OS X 10.4.11 to the Photos App on my brand new MacBook Pro (Intel Mac) running OS X 10.11.6. PowerBook G4 can burn CD or DVD (no flash drive), and MacBook Pro has an external disk drive (but I do not know whether old and new CD/DVDs are compatible).
MacBook Pro with Retina display, OS X El Capitan (10.11.6)