The most reliable way to get the desktop client is via the Mac App Store. You can also find it through reputable third-party distributors:

The app typically requires a "two-piece" setup: an application on your computer and a companion app on your Android device.

Power users can install it via terminal using the command brew install --cask handshaker . For Windows Users

Originally developed by Smartisan Technology, HandShaker is a free file manager that replaces standard tools like Google’s legacy Android File Transfer. It provides a visually rich interface for browsing photos, videos, and music, making it much easier to organize and transfer media between your phone and computer.

Offers version 2.6 for download at Software Informer.