Please help get AVCHD into Photos

Here's an Apple document on importing AVCHD files into iPhotos. I may have some info that might work for Photos.

Using AVCHD video with iPhoto '11 - Apple Support

It's been mentioned a number of times in these forums that AVCHD files are primarily for those who plan on doing a lot of editing of videos and, thus should really import into iMovie. If you don't plan on heave video editing one should use the more compatible formats available on the camera or iPhone.

One member mentioned that they used iVI, iVI 4 on the Mac App Store, to convert the movies and import into iPhoto, Photos, etc.

A client just called me with this same issue, newly introduced after she upgraded to High Sierra. She used to be able to import AVCHD video directly into Photos. So today we tinkered around and discovered that we could use iMovie HD to import these videos instead. Then selected them in iMovie HD, chose "Show in Finder" from the menus, and then dragged those .mov video files into Photos. It's a bit of a pain, not as easy as it was before, but at least it works.