Uno Rev3 on Mac Catalina?

I’m having so many issues but I got to the point of

vrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00

I’ve done Arduino stuff before (with newer boards) but this is an older board (SMD Rev3) and on a Mac and the instructions don’t match up.

  • I don’t have a ‘Processor’ menu I can’t find “Bootloader (old)”

I think it’s just a matter of choosing the right one.