This question already has an answer here:

Trying to install Linux last night, but cannot boot with UEFI. Please add support for UEFi.

I created bootable using unetbootin, pendrivelinux UEFI, but not working.

marked as duplicate by Maccer Apr 21 at 14:05

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Possible duplicate of Installing in UEFI mode – Cog Apr 21 at 13:47
  • 1
    Elementary already supports UEFI. With Unetbootin you should be able to create a bootable usb. Please check your bios settings to be sure you are using the correct boot options. If you need more help please create a new question explaining your problem – Maccer Apr 21 at 14:11