Re: According to OMG Ubuntu your not 100% correct
That is mentioned in the article:
At this point Penguinistas would expect to be able to reach for the Apple Startup Security Utility, which provides the option to boot with No Security. However, according to Apple, this option "does not enforce any requirements on the bootable OS".
Obviously, this has its downsides, but if you're savvy enough to try to put Linux on a Mac, you should understand the implications.
The problem is that, according to a posting on StackExchange, changing the Secure Boot option "makes no difference".