My laser simply will not connect to LightBurn

I got this as a gift for Christmas, as I have had a C02 laser at a previous job and became hooked on the hobby activities I was able to accomplish while I was able to use it! All of this to say - I can not get my Twotrees TTS-55 40W Laser Engraver Machine to connect to LightBurn for the life of me and I can not figure out why! I have followed the instructions found on the youtube page listed with no luck. Any tips or ideas on how I can get around this? I have yet to even to a test print due to not being able to get connected – For reference, I am using my 2017 Macbook Air laptop which my family seems to think is the issue but I cant decide if its this or something more. Any and all help would be greatly appreciated as I am still new to this software/style of Laser

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