Alright guys I need some help with this. I have been trying to boot ubuntu onto my MacBook Pro 8 1. I am using this tutorial https://help.ubuntu.com/community/Ho...%20USB%20Stick
here. I have been able to convert the .iso to a .img file and it said I was able to put the .img on my 16 GB PNY Attache drive. Then when I try to go to boot options by holding alt when I boot up my computer. I just don't even see the option to boot from my USB.
Here is what I am typing in terminal.