I do not see connection with your engraver in either picture. Are you connected with a USB Cable?
Here is a direct link to the driver for your Mac.
https://s3-us-west-2.amazonaws.com/snapmaker.com/download/CH34X_Driver_V1.4_Mac.zip
Inside the zip file is a set of instructions on pdf to help guide you.
With the driver installed, I expect a serial COM port with the letters wch in the name. Bluetooth is way off.
You may have more success with the driver from the company that manufactures the communications chip:
If the language comes up Chinese, don’t worry. Simply scroll down a bit and click the wide blue button with the cloud and the down arrow to download the driver. 