Apple Photos (formerly iPhoto)
Apple Photos is free software that is standard on all Apple products and offers a way to organize your photos and videos.
One important note on Photos: when you sync a camera or device to your computer using Photos, you will copy all of those photos directly to your hard drive - making one large Photos file. If you want to view your images or video and do not want to copy all of them to your computer's hard drive, try Image Capture. It is also standard on Macs and allows you to browse and select your video and images and more importantly, save them as individual files to any folder you choose.