Where is the Mac version of the Librarian software?
The Mac version of the ToneLab Ex Sound Librarian is available from the official website. The Japanese version of Voxamps allows you to download the 1.0.0 version of the Mac driver. Access the page, then scroll down and download the DMG file. Save it to your desktop, double click it and wait for Mac to mount it. When the window opens, double click the Mac installer file and follow the guidance and that's it.
Download page: http://www.voxamps.jp/support/download/tonelab_ex/mac.html