how can I make a USB stick bootable in EFI

I have a MacBook and I would like to check out Fedora. I have created a bootable USB stick with UNetbootin, but it won't boot on my mac. It does on a friends PC (win7). I think this has to do with BIOS vs. EFI, bit how can I solve the problem so I can boot from it on my mac.

The Ubuntu website has great guide on how to do this in OS X.

The previous answer just includes a link to Ubuntu's instructions, so I'll summarize the steps. I've used these steps to create Ubuntu installation media for a Dell server configured for EFI boot.

• Launch Disk Utility
• Select View -> Show All Devices
• Right-click or select the target device, and choose "Erase".
• Choose MS-DOS (FAT), GUID Partition Map
• Click "Erase"

Once complete, download and run Etcher. Select your ISO and click "Flash".