If' you (like me) can't compile source code, there is one thing you could do. If you're mac is new enough, then you could download an Ubuntu liveCD (or any other liveCD), then you can download it from there. True, you would have to re-download it every time you reboot, but it's not that big of a program.
Other options are putting it on a thumb drive, or installing ubuntu (other linux distros).
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