Preview at WWDC likely in June, followed by September launch.
Mac Pro Models Now Available From Apple's Online Refurbished Store
There are several different configurations available, ranging in price from $2,549 for the 3.7GHz quad-core machine with 12GB RAM and 256GB storage to $7,479 for the 2.7Ghz 12-core machine with 32GB RAM and 1TB storage. All available refurbished Mac Pro models ship within 3 to 5 business days.
All of Apple's refurbished products, the Mac Pro included, have been thoroughly tested for reliability and come with the same one-year warranty offered with standard products.
Apple's 2013 Mac Pro made waves when it was released, due to its radically redesigned cylindrical form factor and the fact that the machine is the first to be assembled in the United States. It features Ivy Bridge E processors, dual GPUs, Thunderbolt 2, and fast PCI Express-based flash storage.