3.7 GHz Intel Xeon E5 Quad-Core
12GB of 1866 MHz DDR3 ECC RAM
256GB PCIe-based Flash Storage
Dual AMD FirePro D300 GPUs (2 x 2GB)
Six Thunderbolt 2 Ports
Four USB 3.0 Ports, One HDMI 1.4 Port
Supports up to Three 4K Displays
802.11a/b/g/n/ac Wi-Fi, Bluetooth 4.0
Unique Compact Cylinder Design
Mac OS X El Capitan or macOS Sierra