The Apple application architecture that seamlessly integrates your Mac with your iPhone and iPad is a strength of the Apple product line largely unknown to folks who have not bought into iThings. In the past, Apple offered Aperture to serious amateur and professional photographers and iPhoto for recreational photographers. With Mavericks, Apple replaced the earlier products with Photos, more capable than iPhoto but not as capable as Aperture. To close the gap, I subscribed to Adobe Creative Cloud for Photographers. Can Lightroom and Photos coexist? How?