The new xMac Pro Server by Sonnet is a rack mount for the new Mac Pro.

The xMac Pro Server could be great for Pro Tools HD and HD Native users. It has Thunderbolt 2 connectivity, room for additional hard drives and provides 3 full length PCIe card slots. It houses the Mac Pro in a horizontal position, which Apple says is fine as long as the airflow for the new Mac Pro is not interrupted. The xMac Pro Server does enclose the top of the Mac Pro, but according to Sonnet, the computer’s airflow remains unchanged and unobstructed. The independent airflow through the computer is maintained according to Apple’s specifications.

Features of the xMac Pro Server
– Provides PCIe Card Expansion for Mac Pro
– Use high-performance PCIe cards with your new Mac Pro
– Makes Your Mac Pro Road-Ready
– 4U rackmount enclosure securely holds the computer and PCIe cards in place,
  adding mobility to your Mac
– Three PCIe Slots—Supports three full-length, full-height, single-width cards,
  or one double-width card plus one single-width card
– Thunderbolt 2 Interface—Maximum performance with Mac Pro, backward compatible
  with devices equipped with 10Gbps Thunderbolt technology
– Power for High Performance PCIe Cards—Integrated 300W power supply provides
  plenty of power for any cards you install; 75W auxiliary PCIe power
  connector enables use of power hungry cards such as the
  Avid Pro Tools|HDX or the RED ROCKET-X
– Provides Space for Installing Additional Devices—Using optional Mobile Rack
  Device Mounting Kits, you can install HDDs, SSDs, a tape or optical
  drive, and more inside the xMac Pro Server’s enclosure
– Remarkably Quiet—Temperature-controlled, variable-speed fans automatically
  and quietly cool the cards
– Front Panel Operation, Rear Panel Connectivity—Front panel power button activates
  power switch on Mac Pro; USB 3.0 port enables connection of keyboard,
  mouse, thumb drive, etc.; two Gigabit Ethernet, three USB 3.0, and
  HDMI ports are mounted at the rear of the chassis for easy connectivity
– Energy Efficient—Variable-speed fans automatically adjust to the unique needs of
  each configuration, and the auto power on/off feature ensures there is
  no energy wasted with cards powered on when the Mac Pro is sleeping or off
– Supports Thunderbolt Expansion—Enables daisy chain connection of additional
  Thunderbolt technology devices when other Mac Pro Thunderbolt ports are in use
– Every Thunderbolt-Compatible Card Supported—Works with every Thunderbolt-compatible
  PCIe card, regardless of length or height
– 5-Year Warranty Included at No Additional Cost—No extra charge for a 5-year warranty

The xMac Pro Server will be available in June. You can sign up to be kept up-to-date on the release of the rack mount. more information can be found on Sonnet’s website.