Mac users, try here , and if that doesn’t work, do a Google Search for 'mac utau ".nib"'; works with UTAU Synth v. 1.0.0b18: Since version 0.2.49, Ameya has added the ability for UTAU to be translated to English, and various other languages. For this reason, UTAU wiki is coming up with its own English res files, which were contributed by the users and other external sources. Extract this zip file to the res folder in UTAU. If it doesn't exist, create it. If there's something else in it, overwrite it. The following strings are contained in the file balflcjzy.labelbuttonstring.txt