I don't usually create my own questions, because I can find what I need through other people's questions. However, this one doesn't seem to be anywhere, except in one place where someone is talking about not using Apple hardware. So here it goes. I am using Apple hardware. I have a MacBook 1,1 with Intel Core2Duo running Ubuntu Precise Pangolin flawlessly. I never considered starting with Mac OSx and dual-booting because I never liked Mac OS. Now that I'm realizing that the only way I'm going to be able to run my DAW (Reaper) nicely and use a Firewire recording interface is to run Mac OSx, I'm considering it again. I want to go the opposite direction of most people and install Mac OSx next to an existing Ubuntu installation and have a boot menu with refit. I've installed refit in Ubuntu and I've converted the .dmg file for Mac OS Lion to a .iso file. Now, should I mount the .iso in Ubuntu and run it there, or burn a DVD and restart? I'm trying to gauge how to do this without hurting my existing Ubuntu installation. I will of course keep looking for existing answers in the meantime.
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this is pretty unusual, but might work. There are some problems though. I myself never tried installing this way and i am pretty sure you will run into some problems. Almost certain you will have to reinstall grub and stuff.
Be sure to make a backup of all your important files. And i would personally consider do install Mac OS X first, then Ubuntu again. You can but the lion installation and create a spare partition for ubuntu before installing os x.
About the Lion DMG: If you have a friend with Mac OS X running, you can easily turn the dmg into a bootable usb drive or dvd. I think i followed this guide: http://lifehacker.com/5823096/how-to-burn-your-own-lion-install-dvd-or-flash-drive. However there a lot of them available, just try google. Mac sure your USB Drive is large enough and correctly formated (Apple HFS... you will lose all data on that drive).