problem loading to board with ping tutorial

hello, i'm new to arduino and i'm trying to follow this tutorial:

i'm getting this error when i try to load it onto my board:

"
Problem uploading to board.

avrdude: stk500_recv(): programmer is not responding

"

i'm not sure what this serial port thing is. in the tutorial, it's says:
"6) Select the correct serial port by going to Tools > Serial Port. The Arduino should come up as /dev/tty.usbserial-A4---"

i don't have that listed at all.

does anyone know how i can fix this?

i just bought a breadboard. do i need to select what type of board it is under the tools> board> ?

also, i have arduino 15. the tutorial uses arduino 10, which i downloaded just so i can follow it. are there other tutorials out there that uses arduino and max/msp?

thanks!
r

here is the link to the tutorial: little-scale: Ping Time

"6) Select the correct serial port by going to Tools > Serial Port. The Arduino should come up as /dev/tty.usbserial-A4---"

The above instruction is applied on Mac.
If you use windows, it should display like this Tools>serial port>Com1, Com3