How to sync my pictures from my iPhone to my iMac?

Ok so a few months ago i went on a trip and took a lot of pictures and videos. When i came back, i synced my pictures and vids on to my computer and made a folder of them. After that, i used iTunes to put that folder on my phone but I'm now not able to delete it. I have since deleted the folder off my computer but the pictures are still on my computer but scattered around. I want to know if there's anyway i can take the folder full of pictures from my trip and put it on my computer.

Ok so when you got your iphone it came with a charger. So take it out of the big end and then plug the usb adaptor to your mac and plug in your phone. Then you can use and transfer your pics.

You may try this TunesGo, it can work as an alternative to iTunes. You can use it to export pictures, songs and videos from your iPhone to Mac.