Download and install Android File Transfer from android.com onto your Mac.
It's free.
https://www.android.com/filetransfer/
Reboot your Mac and connect your phone via the appropriate USB cable for your phone directly to your Mac USB port.
If the Android File Transfer app doesn't automatically open when the phone is connected, click on the Android File Transfer app icon on your Mac.
When working properly, you should see a display similar to the following. Locate the files you want to transfer on the phone and drag them to the Mac, or find the files on your Mac using Finder, and drag them to the appropriate folder on your phone.
If your Android device also has microSD storage, you can also drag and drop files to and from the SD card.
I've use it to successfully transfer files via the appropriate USB cable from two different Android 4.4 "KitKat™" phones to Macs running OS X 10.6, 10.8, 10.9, 10.10, and 10.11.
Another way to transfer files is via Bluetooth, if available on your phone.
Turn on Bluetooth on both phone and Mac, pair the devices, then connect and transfer files.
Android apps that offer 'Sharing' should recognize a Bluetooth connection.