On my last system upgrade (to Yosemite) Photos replaced iPhoto (and its better). However whenever my wife or I plug our iPhones into our iMac, iPhotos launches (and takes its time to do so!). How can I stop this and forget iPhoto, and just get Photos to launch when its wanted, not every time? I use Lightroom which allows me to import directly from an iPhone, but my wife only needs Photos. Many thanks for any suggestions!