Go to the Bluetooth settings on your phone and select "Find Me" - it will ask you to turn on Bluetooth, say yes.
Click on the Bluetooth icon in your menu bar (if it's not there you can turn it on from the Bluetooth pane in System Prefences) and select Set Up Device or whatever the menu item is that looks most like a Set Up option.
It will begin looking for your phone, when it has found it and identified it as a Moto L2 click "Next" or OK or whatever the button to move on is and it will go about pairing your device. Once that is done (you only need to do it once) you will be able to send images to your phone by selecting "Find Me" from the phones, BT settings, clicking on the bluetooth icon in the menu bar and selecting "Send File", browse to the image you want to send and click "send." The phone should ask you to accept and voila!