Install NetBSD from USB stick
Since NetBSD 5.1, a special image is generated for i386 and amd64 architecture. This is called “memstick”.
Install OpenBSD from USB stick
Today, I feel like testing OpenBSD again. I want to see how it works as a workstation. So I’m gonna run a 4.9 (snapshot) on a Asus EeePC 901. AFAIK, OpenBSD doesn’t provide official bootable USB stuff. I tried burning the various iso files on the USB stick but it wouldn’t boot… surprise! Then I tried using unetbootin which, of course, doesn’t support OpenBSD… Success came using a virtualisation software to install a minimal OpenBSD system on the USB stick and (re)run the install from there.
ISO to USB on OSX
This is how to burn the Ubuntu Remix image onto a USB stick.