Apple today gave a sneak peek of the iMac Pro (apple.com/imac-pro), an entirely new workstation-class product line designed for pro users with the most demanding workflows. The all-new iMac Pro, with its 27-inch Retina 5K display, up to 18-core Xeon processors and up to 22 Teraflops of graphics computation, is the most powerful Mac ever made.

It features a new space gray enclosure and support for one billion colors. It's due to ship in December starting at $4,999. In addition to the new iMac Pro, Apple is working on a completely redesigned, next-generation Mac Pro architected for pro customers who need the highest-end, high-throughput system in a modular design, as well as a new high-end pro display, but it won't arrive until next year.

“We’re thrilled to give developers and customers a sneak peek at iMac Pro. This will be our fastest and most powerful Mac ever, which brings workstation-class computing to iMac for the first time,” said John Ternus, Apple’s vice president of Hardware Engineering. “We reengineered the whole system and designed an entirely new thermal architecture to pack extraordinary performance into the elegant, quiet iMac enclosure our customers love — iMac Pro is a huge step forward and there’s never been anything like it.”

Featuring next-generation Intel Xeon processors up to 18 cores, the iMac Pro is designed to handle the most demanding pro workflows. With an all-flash architecture and all-new thermal design, iMac Pro delivers up to 80% more cooling capacity in the same thin iMac design.

The iMac Pro will come with the new Radeon Pro Vega GPU, the most advanced graphics ever in a Mac. Featuring a new, next-generation compute core and up to 16GB of on-package high-bandwidth memory (HBM2), iMac Pro with the Vega GPU delivers up to 11 Teraflops of single-precision compute power for real-time 3D rendering and immersive, high frame rate VR. And for half-precision computation, ideal for machine learning, iMac Pro delivers up to 22 Teraflops of performance.

The iMac Pro also supports up to 4TB of SSD and up to 128GB of ECC memory, and with four Thunderbolt 3 ports can connect to up to two high-performance RAID arrays and two 5K displays at the same time. For the first time ever on a Mac, iMac Pro features 10Gb Ethernet for up to 10 times faster networking.