Enable developer mode by entering the following menus on your device.
SETTINGS
ABOUT PHONE
BUILD Number (Version) - Tap this 7 times to enter into developer options mode.
Once you are in DEVELOPER OPTIONS Menu
Scroll down to USB DEBUGGING and enable this mode.
When you connect your phone to your MAC you will have the option to select transfer files.
The only other thing you may need to do is select MTP mode if no files are shown on your desktop Android File Transfer app.
Once connected, if you are transferring photo files, these will be found in the folder named DCIM, and then by clicking the CAMERA folder.
TIP - As you can not view the photos whilst connected to the android device, group photo's into a folder on your device before you connect to MAC, then you can transfer all the photos in that particular folder.
You will find any photo folders you create in the "MY ALBUMS" folder.
The video links below may be of use.
