Ubuntu - Create bootable USB (Ubuntu) - In this quick tutorial I am going to show you how to create a bootable usb stick for Ubunut in Mac OSX.This will launch Apple’s ‘Startup Manager’ which shows bootable devices connected to the machine. If you want to use your USB stick with an Apple Mac, you will need to restart or power-on the Mac with the USB stick inserted while the Option/alt (⌥) key is pressed. Here we have penned down easy to follow guide for you, it is about to create and boot from a Linux USB drive on Mac. Macos Create A Bootable Usb For Ubuntu Windows 10.