Several of the Mac sites are saying Apple will officially release OS 10.10.3 with the Photos app late today. IMHO as a beta user my $0.02 is that Photo is OK as a replacement for iPhoto. It is a joke as a replacement for Aperture. At least the Aperture users have had time to plan their migration to Lightroom, Capture One Pro, or other DAM and editing apps. The latest rumor I saw on the LR 6 release date is April 21. But LR 6 release has been rumored for March and April. It seems to be a moving target.