Mac Compatibility:Mac with Thunderbolt 3 portsMac with a Thunderbolt 2 or Thunderbolt port with an Apple Thunderbolt 3 (USB C) to Thunderbolt 2 Adapter plus a Thunderbolt 2 cable (both sold separately)macOS 10.12.6+macOS Catalina compatible Windows Compatibility:PC with Thunderbolt 3 portsWindows 10 (64-bit Edition Version 1809 or greater) Linux Compatibility:Linux computer with Thunderbolt 3 portsLinux Kernel 5.0+ Form Factor:Desktop expansion system External Connectors:Two Thunderbolt 3 ports12V power port Internal Connector:6-pin Mini-Fit Jr (same type as on legacy Mac Pro motherboard; provides power for PCIe card that requires supplemental power) Expansion Slots:One x8 mechanical (x4 electrical) PCIe 3.0Two x8 mechanical (x8 electrical) PCIe 3.0 PCIe Cards Supported:One half-length+ (up to 7.75 inches long), double-width, full-height x8 PCIe card, plus one single-width card orThree half-length+, single-width, full-height x8 PCIe cards