I just recently bought a new MacBook Pro, and am having trouble installing Muse on my computer. I have it installed on my old MacBook Pro, and didn't have any problems downloading/installing. I'm not sure exactly how to show you my "log" from the installation, but I'd really like some help with this. So please get back to me as soon as possible, and let me know what the next step would be.
If you're using OS 10.7.2, could you try updating to 10.7.3 and see if the install works? Please see this post for more details: