See our DisplayPort version here.
Mac OS does not support the MST technology for expanded monitors. It will only allow for mirroring.
The Accell DisplayPort 1.2 to 3 DisplayPort Multi-Display MST Hub allows you to enjoy up to 3 DisplayPort monitors from a single DisplayPort output. The multi-monitor splitter supports 3 independent displays at 2048x1536@60Hz each with DP 1.2 multi-stream transport (MST) or 3 mirrored displays at 2560x1600@60Hz each with DP 1.1 single-stream transport (SST).
You can view a single image across three displays for gaming, graphic design, or spreadsheet analysis. You can also dedicate each display to a separate application for efficient and productive multi-tasking. Use 2 MST Hubs with a graphics card with multiple video outputs to connect up to 6 external displays -- ideal for digital signage applications such as video wall configurations.