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OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!

Using Two Thunderbolt 3 Ports to Build Out a System

Thunderbolt 3 has twice the bandwidth of Thunderbolt 2—terrific. But it cannot connect to most displays without an adapter of some kind; see Options for Connecting a Display with Mini DisplayPort or DisplayPort input to a Mac with Thunderbolt 3 / USB-C.

There is also the issue of using existing Thunderbolt 2 devices, such as (in my case) five Thunderbolt 2 OWC Thunderbay 4 units containing hard drives. There is no point to upgrading them for performance; the speed won’t change since hard drives don’t come close to maxing-out Thunderbolt 2.

Display connectivity is a particular thorn, because it terminates the Thunderbolt chain. The OWC Envoy Pro EX Thunderbolt 3 SSD is another such case (terminates the chain, as any bus-powered Thunderbolt peripheral must).

In other words, I have two devices that will terminate the Thunderbolt chain, and only 2 ports on the 2017 iMac 5K. This is one strong point in favor of the iMac Pro, which has 4 Thunderbolt 3 ports on two Thunderbolt 3 busses.

How am I going to manage this with the 2017 iMac 5K? Here’s how.

Thunderbolt 3 Port #1

Connect to OWC Thunderbolt 3 Dock, which has its own Mini DisplayPort port; this allows my NEC PA302W wide gamut display to operate.

Pug my main storage, a Thunderbolt 3 version of the OWC Thunderbay 4, into the Dock. It in turn has a Thunderbolt 3 port into which I can plug an Apple Thunderbolt 3 Male to Thunderbolt 2 Female Adapter, then hang my existing Thunderbolt 2 OWC Thunderbay 4 units off that.

Thunderbolt 3 Port #2

This port could serve the OWC Envoy Pro EX Thunderbolt 3 SSD or any other Thunderbolt 3 peripheral with that SSD at the end of the chain.

All of this feels quite limiting, which is why the iMac Pro with its four Thunderbolt 3 ports on two Thunderbolt 3 busses is appealing.

Below, the OWC Thunderbolt 3 Dock has a mini DisplayPort for connecting an external display.

OWC Thunderbolt 3 Dock port layout

Configuring my 2017 iMac 5K

See Switched to 2017 iMac 5K as Primary Machine: Details on Gear I’m Using.

Below, the storage for home and travel:

CLICK TO VIEW: Configuring my 2017 iMac 5K

The iMac 5K along with the NEC PA302W and the Apple Thunderbolt 3 Male to Thunderbolt 2 Female Adapter.

CLICK TO VIEW: Configuring my 2017 iMac 5K and Various

OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!
OWC Envoy Express

World’s first Thunderbolt 3 M.2 NVME SSD enclosure.

Super fast, bus-powered, 3.3 oz, DIY easy, rugged and compact!


See also OWC Express 4M2
√ No more slow and noisy hard drives!
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!

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