Download of ZOOM G3v2 G3X System updater 2.10 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free Mac application is an intellectual property of Zoom Corporation. The application lies within System Tools, more precisely Device Assistants.
From the developer:
ZOOM G3v2 G3X System updater is a free application that allows you to update your G3v2 G3X device firmware. Also with this application you can download firmwares. In order to use patches made on a G3 using firmware v1.12 or earlier, you must use the Edit&Share software to convert the patch data.
You may want to check out more Mac applications, such as Stratus System Update, zoom.us or nanoKONTROL2 Updater, which might be similar to ZOOM G3v2 G3X System updater.