The Mac that Thunderbolt built The newly compact Mac Pro

Call it the era of the extroverted computer.

In the old days of personal computing expansion meant using vacancies inside a computer chassis where you could plug in graphics cards and hard drives. But now because of Apple's fondness for Intel's high speed Thunderbolt data port expansion means hooking up devices outside the chassis.

Connecting external devices has long been just about the only way to bring new hardware to laptops. But at its WWDC 2013 show on Monday Apple showed that the sealed box philosophy of the laptop is coming even to Apple's highest end most expandable machine the Mac Pro.

Today's Mac Pro is a large rectangular box granted a more elegant box than most Windows tower PCs and workstations but a box nonetheless. When the new Mac Pro arrives later this year though customers will get a compact cylinder that's one eighth the volume of the existing machine.

The new Mac Pro You have to see to believe (pictures)

From a hardware engineering perspective the new Mac Pro is quite an architectural departure.

Instead of empty PCI Express slots and vacant hard drive bays the new Mac Pro will come with six 20Gbps Thunderbolt 2 ports powered by three controllers separate controllers. Each port accommodates a daisy chained collection of up to six devices such as storage arrays 4K monitors and video capture devices.

Oh and it's got four USB 3 ports too. Those may not be as glamorous especially since they won't be the double speed USB 3 ports due to arrive in 2014 but they'll still be workhorses for more mainstream devices such as flatbed scanners and backup drives.

The new Mac Pro is a machine that's geared for video editing photo compositing software development computer aided design and other high end computing chores where fast processors and copious amounts of memory are worth the extra cost. It's aimed squarely at the creative pros who once were the mainstay of Apple's business but who have suffered now that Apple has turned so much of its attention to its highly profitable horde of iPhone and iPad customers.

Mac Pro sneak peek (pictures)

The back panel new Mac Pro is studded with input output ports so many and so central to the functioning of the machine that it might be better to think of it as the front.

(Credit James Martin/CNET)

Two other departures from conventional architecture struck me too

The new Mac Pro has a unified thermal core that distributes heat load more evenly across the entire system rather than concentrating it in the CPU and GPU hot spots. It uses a bottom to top airflow rather than the traditional front to back design to bring in cool air. That's smart given that heat rises but for those who park their machines under a desk I hope that airflow won't turn the machine a dust bunny harvester.

The machine will come with an SSD but it'll be connected in a different way from what's common on today's PCs. Instead of using the SATA interface designed for hard drives it'll be one step closer to the action by connecting directly to the PCIe interface.

The machine will have a single processor but it'll be a doozy an Intel Xeon E5 model with up to 12 processing cores.

Creating such a Thunderbolt centric architecture is a mixed blessing for Mac Pro's customers. On the plus side they don't have to pay for the extra sheet metal of a larger Mac Pro. And the compact canister shaped design will fit more easily on top of desks instead of under them for easier access to all those ports.

But for customers who need to plug in lots of peripherals the new Mac Pro will rapidly lose its sleekness. DVD drives scratch disks for photo editing backup disks and storage arrays for fast access to heavyweight video projects are going to pile up in a jumble of mismatched electronics.

Moving expansion outside the system has been a steady trend for the Mac line. Though in the 1980s the Macintosh II introduced internal expansion ports to the family Apple more often has eschewed the approach. It's no coincidence that Apple adopted the SCSI interconnect for daisy chaining peripherals in the 1980s and 1990s later pushed ahead with FireWire aka IEEE 1394.

So although the new Mac Pro may look different it's actually more of a return to Apple values than a departure.

The new Mac Pro uses a bottom to top airflow a design that means vents are in a ring around the top.

(Credit James Martin/CNET)

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