That means that there's something wrong with the way you have the Atmega32U4 attached to your Mac.avrdude: ser_open(): can't open device "/dev/tty.usbmodemfd121": No such file or directory"
mlandergan wrote:This is what I got when I uploaded the code
"Binary sketch size: 7536 bytes (of a 28672 byte maximum)
Connecting to programmer: .
Found programmer: Id = "LUFACDC"; type = S
Software Version = 1.0; No Hardware Version given.
Programmer supports auto addr increment.
Programmer supports buffered memory access with buffersize=128 bytes.
Programmer supports the following devices:
Device code: 0x44 "
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