On macOS 27 GoldenGate, VOCALOID3-5 voicebanks may not install correctly in some cases. If this occurs, please try the following steps:

1. Navigate to Applications > VOCALOID3-5 > Uninstaller, then launch the Uninstaller and perform the uninstallation.
2. During the uninstallation process, you may be prompted to install Rosetta 2. Please proceed with the installation.
3. Once Rosetta 2 has been installed, run the VOCALOID3-5 voicebank installer again.