First time uploading Firmware error- stk500v2_getsync (): timeout communicating with programmer does not exist

Hi Everyone,

I am new to this product and I have run into an issue that I cannot seem to find an answer to from other posts.

I am trying to upload the new Firmware. I am using Arduino 1.8.7 on a Mac, and I downloaded the Vertex-m1-v1.4-h2 firmware. I have attached a screenshot of my Arduino window.

My error says < the selected serial port avrdude: stk500v2_getsync(): timeout communicating with programmer does not exist or your board is not connected >

Does anyone know how to fix this error?

I look forward to your reply!

I solved the problem by switching my serial port to /dev/cu.usb.serial-AL004U4D

But I have no idea why that worked!