How to "uninstall" Rosetta manually installed into Lion (or Mt. Lion)

Question

Some users of Final Cut Studio 2 (and some users of Logic Pro 8) discovered that they could not use the installer app for these programs in Lion.
Some on this forum (and others) have suggested that Rosetta be installed from a Mac OS X Snow Leopard Install DVD into Lion or Mt. Lion.  Although that technique does work for FCS2 (and perhaps Logic Pro 8), the better and SAFER approach is to use Pacifist.
In any event, I am beginning to see anecdotal reports that some of these "Rosetta-installed" Lion Mac are experiencing problems "down the road."  I am also receiving requests from those who did install Rosetta on instructions on how to remove it.
In an attempt to get Rosetta out of these machines BEFORE it can corrupt any other files, we would appreciate a detailed instruction on how to remove Rosetta from Lion (and to the extent that the instructions would be different, on Mt. Lion).
I post this on behalf of those who installed Rosetta; I am not one of them...

Answer 1

However translate is there, as you can see from this screenshot.  So the problem here must be EasyFind:
That's weird. EasyFind is what I use for any search (I never bother to even look at Spotlight). translate came up, along with 400 other files with "translate" in the name. The vast majority of which had the identical name of WordTranslatedFontSample.
Kurt, can you fresh my memory on how to delete files in the "usr" directory; I seem to recall it involves using logging into the Root level.
Nah, no need to go that route. One way is from within EasyFind itself. You could just highlight the file and click the Delete button at the top. Still don't understand why it doesn't show for you (unless the drive you have chosen for it to search, minilax, is not the correct drive). But otherwise, to view all files and folders on your Mac, open the Terminal and enter the following two lines.
defaults write com.apple.finder AppleShowAllFiles TRUE
killall Finder
The second command forces the Finder to relaunch so it reads the change you made to the Finder .plist file.
All hidden files and folders will now show as grayed out objects, but they are all accessible. You'll be able to navigate directly to the /usr/libexec/oah/ folder.
When you're done, type in the same two lines, except change TRUE to FALSE to return file viewing to normal.
Clearly RosettaNonGrata stays put, but...
As far as I can tell, that file has no use other than to turn Rosetta on and off using the Terminal. Like this:
Disable Rosetta:
sudo /usr/sbin/sysctl -w kern.exec.archhandler.powerpc=/usr/libexec/oah/RosettaNonGrata
(These two sudo commands are all one line, they're just wrapping in the forum display)
That's a quick cheat to get Rosetta to reinstall. After running the command, Snow Leopard believes Rosetta is not installed (even though it is). When you attempt to run a PPC app, OS X then asks to download and install Rosetta.
You can also manually reenable it:
Re-enable after Rosetta has already been installed:
sudo /usr/sbin/sysctl -w kern.exec.archhandler.powerpc=/usr/libexec/oah/translate
Other than getting the Rosetta translate file to reinstall without searching for your Snow Leopard disk, the commands don't have much use.
I have a different opinion about the Shims folder: it appears clear to me that it was created by the installation of Rosetta.
You could very well be right. Being in the same folder with the other two items, you would assume they're related. If I drill down through the various items in the Shims folder and opened them in TextEdit (including the .dylib files), nothing references Rosetta. At least not by name. It's rather hard to tell what any of them are for.