photos,not,loading,as,a,picture,only,diagonal,lines,on,scone,pictures

Hi as you can see my photos, are not,loading,as,a,picture,only,diagonal,lines,on,scone,pictures. I have loaded the same pictures on to iPhotos and pictures they are ok. I have also had then loaded on to lightroom with no trouble.

The same think happens on my iMac and my MacBook pro.

I have tried to edit them and after a while the photo appears after i edit it, it still shows diagonal line in the organiser and well as the editor.

Both computer are running Mac version Sierra 10.12.1 (16B2555(Retina 4K, 21.5-inch, Late 2015) on iMac

MacBook pro using same version model is late 2010

Hope some one can help

Harry