Hey all i spend a lot of time just trying to boot the live version on my mac, here is how i finally installed it.

Turns out that MAC does not handle very well iso images so we transform the image to dmg, just this allowed me to boot live
Code:
hdiutil convert -format UDRW -o /path/to/image.dmg /path/to/image.iso
The installation could have problems if you don't have an internet connection so if you don't want to spend a lot of time figuring out how to compile your image with the wireless driver go to some electronics store and buy a 10 Dollar Debian compatible USB wireless adapter like the TP-Link TL-WN722, this will make your installation and configuration easier.

To install wireless drivers after Linux installation use
Code:
sudo apt-get update
sudo apt-get install firmware-b43-installer
My Grub was starting linux by default so instead of configuring it i just rerunned the rEFInd installer so it sets it as default again.
(Not really sure if installing Grub is needed) Still a newby on this.

This DualBoot Ubuntu tutorial helped me a lot
http://courses.cms.caltech.edu/cs171...and_Ubuntu.pdf

When trying to boot live and always crashed try reinstalling Linux in your USB again :s

Hope this save you some frustrating days