Computer and processor Windows: 1.6 gigahertz (GHz) or faster, 2-core. 2.0 GHz or greater recommended for Skype for Business.

macOS: Intel processor.

Memory Windows: 4GB RAM; 2 GB RAM (32-bit).

macOS: 4 GB RAM.

Hard disk Windows: 4.0 GB of available disk space.

macOS: 10 GB of available disk space. HFS+ hard disk format (also known as macOS Extended) or APFS.

Display Windows: 1280 x 768 screen resolution (32-bit requires hardware acceleration for 4K and higher).

macOS: 1280 x 800 screen resolution.

Graphics Windows: Graphics hardware acceleration requires DirectX 9 or later, with WDDM 2.0 or higher for Windows 10 (or WDDM 1.3 or higher for Windows 10 Fall Creators Update). Skype for Business requires DirectX 9 or later, 128 MB graphics memory, and 32 bits per pixel capable format.