photos not uploading from my iPhone to my mac

I have seen others who are having this problem since upgrading to the new photos from iPhoto. I have had seven different Apple Tech's try to help me (4 chats, one phone and two in-person). We reinstalled everything (complete software reinstall) as an option. Each time I have worked with a tech they have fixed it, only for it to start happening again after 3-4 days. I am so frustrated! Apple does not seem to have a fix for this. Can anyone help me?