How to install Ubuntu as the single OS on a MacBook?

How do I install Ubuntu as the only OS on a MacBook?

That is, I'd like to completely remove Mac OS X and install Ubuntu. I've tried dual-booting, but I've had so much trouble that I prefer to have only Ubuntu installed.

• Insert the Ubuntu LiveCD into your Mac and Shutdown. Restart the Mac and hold the Option Key. When prompted select 'Try Ubuntu' .

• Once the system is booted run Disk Utility from the dash .

• Select your hard disk and click on Format Disk .

  

• Now select 'No Partition' .

• Now install Ubuntu normally .

To Avoid long EFI wait before GRUB
If your Macbook spends 30 seconds with "white screen" before GRUB shows, try booting from your Mac OS X install disc, select language, then click Utilities- Terminal, and enter:

bless --device /dev/disk0s1 --setBoot --legacy

Assuming that the bootloader is on sda1, otherwise /dev/disk0s2 if it's on sda2, etc.

I just tried installing Ubuntu 14.04 on my Macbook Air Early 2014. The only thing that worked for me was:

1. Insert Live USB, go for 'Try Ubuntu'
2. Start GParted and delete all drives and partition table. Don't forget to apply the changes.
3. Create a new partition table of MSDOS type (Under Device menu).
4. Start the installation process.
5. When asked for the location of the installation, please select 'something else'.
6. You will see just one drive in that list. Select it and choose to install just one partition i.e. '/' or root.
7. Ubuntu will give you a warning about what you are trying to do. Just say 'Continue...'
8. Follow rest of the installation as is.

This still gives me the 30sec white screen which I believe can be removed with the ' bless' command. So far I haven't figured out how to create an encrypted root though.

I will try to edit this later and see if I can post some screenshots as well.