On a Mac, open terminal and use the SSH command and IP address to login. If you are using Windows, please follow this tutorial to login to your Raspberry Pi via SSH with Putty. Of course, use the IP address of your Raspberry Pi. ssh [email protected] The default Raspberry Pi username is. Enable optional USB boot on Raspberry Pi 4; Enable USB boot for Raspberry Pi 2, 3 and 3+ The Raspberry Pi 4, 3+, 3 and Pi 2 v1.2 with the same BCM2837 SoC as the Pi 3, are capable of booting from a USB drive. For the Pi 2 and 3 you’ll first need to program USB boot mode, this is unnecessary on the Pi 3+ as USB booting is enabled by default.