Camera roll photos won't import to Mac Photos

hi all. not sure if best place question don't know if macbook photos issue, iphone 8 plus issue, or ios 11 issue.

ever since moving on 8 plus , ios 11, having major issues trying import photos , videos cameral roll photos application on macbook. in newer photos app, larger portion of pictures , videos not showing available import. , of videos do, when try import, following error:

cannot import item
item cannot added photo library because may recognizable file format or file may not contain valid data.

reason code states:

unsupported file type

cannot life of me figure out. photos or pics taken on phone, , since moving ios 11. not sure if has new heif/hevc format have turned on? think taken iphone, plays without issue on iphone, not unsupported macbook photo app.

has read on or had happen them? want these files on computer. thanks.

 

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