Fuse the bits to clock the Attiny at 8mHz
lfuse sets the 1mHz internal clock hfuse sets brownout detector at 2.0v
avrdude -p attiny24 -P /dev/cu.usbmodemfd121 -c avrisp -b 19200 -U lfuse:w:0x62:m -U hfuse:w:0xd8:m -U efuse:w:0xff:m
check the port that the attiny is connected to ls -l /dev/cu.*
Increment the UUID and stick on the code
python build.py; make all; avrdude -p attiny24 -P /dev/cu.usbmodemfd121 -c avrisp -b 19200 -U flash:w:ant.hex;