Transfer Photos from mac to iphone

Oh right sorry I misread, 2 options:

Sync photos between your Mac and iPhone or iPad - Apple Support

or use iCloud Photos

Set up and use iCloud Photos - Apple Support

If you have iCloud phtos activated on both the mac and the iphone, any picture you ad to one, will go to the other(as long as its in the iCloud photo library)

Good luck!

Like this:

Transfer photos and videos from your iPhone, iPad, or iPod touch - Apple Support

Good luck!

Wrong direction! They asked for Computer to Phone, not phone to computer.

Yes, read the reply above yours