Pretty self-explanatory, but basically if you select multiple photos in the Photos app on High Sierra, it clearly states that it will take the first photo, set the new date, then adjust all the other photos back by the same amount. Apple calls it "time-shifting".
Example: If I select 10 photos, change the date of the first one by -5 years, all the photos change by -5 years instead of all photos simply changing to the new date.
I'm not sure if I explained this well enough, but essentially there's no way to change the date/time of all selected photos at once. Honestly, this is ridiculously stupid.
P.S. As an aside, why doesn't Photos give an option to edit videos with iMovie or Clips, anything Apple-related? I take that back, why does Photos suck in general?
Example: If I select 10 photos, change the date of the first one by -5 years, all the photos change by -5 years instead of all photos simply changing to the new date.
I'm not sure if I explained this well enough, but essentially there's no way to change the date/time of all selected photos at once. Honestly, this is ridiculously stupid.
P.S. As an aside, why doesn't Photos give an option to edit videos with iMovie or Clips, anything Apple-related? I take that back, why does Photos suck in general?