How to import photos from an iPhone to a Mac and delete them off the iPhone after?

I have a PC and I recently did this a few days ago w no problem but my friend who owns a Mac asked for my help. She already imported all her photos but when she imported them she didn't choose to delete them off her iPhone because she didn't see the option to. I told her to delete the file from her mac so she can import the pictures again to choose the delete option, but she said she can't delete an entire file. I'm not familiar with macs so any info can help, thanks!

When she import her photos to iPhone, iPhone will put the photos into Photo library Albums. And those albums can't be deleted by iPhone. You can delete them by some third party app tool, which can access into iPhone system library. Such as http://www.fireebok.com/cleanmyphone.html. It has Mac version &PC version.