MaxElmar
Well-known
Nice introduction at Re/Code. Did not see it in this article, but the software is supposed to be extensible with plug-ins. This could make up for the current lack of some features found in Aperture. (Hope I'm using the word "extensible" correctly.) And, before someone bursts a blood vessel over it, storing everything in iCloud is completely optional.
http://recode.net/2015/02/05/first-look-apples-photos-app-for-mac-os-x/
http://recode.net/2015/02/05/first-look-apples-photos-app-for-mac-os-x/