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1. WHAT TO LIST FOR USB PORT FOR AVDUDE ON MAC?
2. ERROR 86 WHEN TRYING TO WRITE FIRMWARE TO PANCAKEBOT

I'm not sure how or what to put as my USB "Port" inside the AVDUDE settings.
I tried pasting " ls /dev/tty* " in Mac's TERMINAL program (magnifying glass at top right of screen, typing TERMINAL and when the box pops up I pasted that ls /dev/ttyUSB* phrase and hit enter). It just lists a ton of various "ttyXXX" (where XX = sequential numbers) and I dont see any listings for "USB" or "tty.USB" as it says I should see in the tutorial.
If I try just selecting "tty.USB0" from the pull-down port options in AVDUDE and hitting apply/OK and then clicking WRITE on the main screen of AVDUDE, it gives me a popup error "Error 86-- Bad CPU type in executable"

Any help on how to find (or what pull-down option to use) as my USB port ?
I wish it wasn't this hard. I thought I was fairly computer savvy.....