Make sure the phone-side version is 1.1.15 or above!

Enable USB debugging on your Android smartphone after you install the drivers.

Windows 10/8.1/8/7/Vista/XP (core package): universal 32-bit/64-bit

Some phones require supplementary Windows-only drivers (first install the core package): Samsung / LG

macOS 10.12, Mac OS X 10.11 (El Capitan), 10.10 (Yosemite): Intel 64-bit

Drivers for legacy OS X, Linux, FreeBSD computers and OpenWrt and LEDE-based routers can be downloaded here