I have just started checking out Photos for OS X. The absence of star ratings in Photos is definitely a pain. However, I find that rating photos via keywords is not as bad as I had originally expected. If 1 Star, 2 Star, 3 Star, 4 Star and 5 Star keywords are created, with the shortcut keys 1, 2, 3, 4, and 5, respectively, it is quick to add or change ratings when the Keyword Manager is open. Pressing a number key adds the rating. To change a rating, press the number key corresponding to the existing rating to remove it, then press the number key for the revised rating.
You heard it here first… the LUMIX S1H is getting ProRes RAW in early 2020!! Watch here to learn more.