Got my new RPi 3s. So exciting! Connect to my [serial cable](https://www.adafruit.com/products/954https://www.adafruit.com/products/954), fire up [Serial](https://itunes.apple.com/us/app/serial/id877615577?mt=12) on the Mac, ready to install my normal way, and….garbled garbage. Turns out some winner in Piland re-used GPIO pins necessary to make serial work for Bluetooth. I guess they figured that no one used serial console? To fix, you’ll need a monitor & keyboard. First follow the instructions [here](2016-03-13-raspbian-setup-notes.html) up through “Update firmware” (rpi-update). Then edit /boot/config.txt and add the line: dtoverlay=pi3-disable-bt Reboot, and your serial console will work again.