A company called Sonnet is stepping up to address that gap. Its new xMac Pro Server is a 4U rack-mountable enclosure that holds a 2013 Mac Pro, includes three standard PCI Express expansion slots ...

This time, the Sonnet Rack Mac Pro allows users to rack mount one or two Mac Pro machines in a 4U space. The unit includes a front panel power button with USB 3.0 port for each machine ...