I have MC1 8.0.194 on Mountain Lion. I go to my classical selection, click on a Joaquín Rodrigo song called Rosaliana, >click on Action Window>Tag, and write the composer's name. Only I want to add his first name also. This is Joaquín. I simply cannot do this in the Tag section of MC.
I am not talking about importing, or cutting and pasting: I believe MC can deal with accented words under these conditions. It is in the manually editing information on the keyboard (Spanish) that MC cannot cope with inserting accented letters into the metadata.