I just found an email from iRod dated sept 7, sent from linuxmint forums. Oddly, my messages at top of this forum still don't show such message being sent through linuxmint forums.
Brasero is a CD burning program available AFTER Linux is installed.
I don't use Mac, know little of it, but to create a Linux boot disc, you need to open a CD creator program in Mac, set it to create a disc from a disc image or ISO file, then point it to the ISO file you downloaded and let it create the expansion onto the DVD. Only then will the DVD disc work as a boot disc. You can't boot direct from the ISO file, it must be expanded onto a DVD disc, or onto a USB thumbdrive using something like Universal USB Installer from pendrivelinux.com
Mac Intel uses an EFI file like Windows 7 & 8 do, so best if someone with experience with both Mac Intel computer and Linux help you with this problem.
Hopefully this answers the questions you had in the email.
It doesn't solve why the email message never appeared in my linuxmint forum message listings.
All things go better with Mint. Mint julep, mint jelly, mint gum, candy mints, pillow mints, peppermint, chocolate mints, spearmint,....