I use Lightroom 6 on my IMAC. When I import to the IMAC my photos import in random sequence. this is new. they used to import in capture time. I have the capture time checked in the library. I also have Lightroom 5 on my computer and the import is perfect. I prefer lightroom 6 because of the hdr. But when the import is not in order I cannot use the hdr. Again, my library shows the capture time is checked.