Thank you! (I should repeat that about 20 times) After days of fiddling around with manual downloads, Adobe (non)support, uninstall, reinstall, etc. I found your post because I too finally went for a completely new installation (OS 10.8.4, Adobe Master Collection). When I ran the updater tool after the new install I got different errors than I had before and one of them led me to this post (U44M1I11). Hopefully I can return the favor. Not really wanting to go through all the effort that you've described, I ran the updater again with Activity Monitor open. As you said, suddenly another instance of AAM sprung up with root as the user. I immediately killed it (force quit) and the original instance under my user name kept running, finished the download and the installation! Perhaps the bold and exclamation is too much, but this issue has been plaguing me on two separate Macs and has wasted countless hours. Good luck out there folks. Error Codes Involved: U44M2P7 U44M1P7 U44M1I11 U44M1I10
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