When you add your new printer after you installed the driver on your Mac, you may not find a printer in the device list.
Please follow the steps below:
1. Unplug the USB cable from your Mac
2. Turn off your printer and then turn it on
3. Plug your USB cable into your Mac
4. Long press the Feed button for a few seconds until you head one beep, release your finger and the printer will automatically complete calibration .
5. Go back to "system preferences"-->"printer and Scanners"-->click"+", then you will find a new printer.