How to install Ubuntu on a Mac and keep OSX?

Question

Could anyone provide a concise step by step instruction on how to install Ubuntu 12.04 on a Mac OS X Lion?

I have read that Ubuntu corrupts the EFI file so I would like to hear from those who have successfully done it.

For 12.04:

I wrote an extensive tutorial here. It worked perfectly well for me and I didn't have any issues since doing exactly what I describe in my blog post a couple of weeks ago.

Comments

[someGuy45]

can I safely assume that using the install along side mac installs into the created partition?

[tpei]

It is considered to be safe and it worked for me. But it isn't too difficult to specify the empty partition manually, so if you'd rather like to be absolutely certain...

[nilsonneto]

Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.

[Braiam]

Please, instead of including just the link, include the facts. I don't see any restriction in the link you pasted.