OWC Thunderbolt 3 mini Dock review: Affordable dock offers connectivity for two 4K external displays

The two HDMI 2.0 ports can each handle up to 4K video at 60Hz.

Credit: OWC

Docks abound for USB-C connectors, whether for USB-only devices or for those—like all Macs released in the last few years—that sport the very high-speed Thunderbolt 3. The Other World Computing Thunderbolt 3 mini Dock offers the lowest price so far for offering support via Thunderbolt 3 for two 4K displays. If you need to add two displays and want to preserve USB-C ports, then this dock fits the bill.

The two HDMI 2.0 ports can each handle up to 4K video at 60Hz. You can also use HDMI adapters and cables to work with other compatible standards, like DisplayPort.

The dock includes just three other ports: one high-speed USB 3.0 (Type A), one USB 2.0 (also Type A), and gigabit ethernet, which tested at gigabit speeds even with all ports occupied, as it should. However, I was unable to get the ethernet port to appear immediately on my Mac, which may be related to previous Thunderbolt docks used with the computer. After a standard restart, however, the ethernet interface appeared as expected in the Network preference pane and tested perfectly.

The USB 3.0 port is a reasonable replacement for taking up a somewhat faster Thunderbolt 3 slot on your Mac. Any purpose that requires Thunderbolt 3 full data rates would be one you’d want plugged directly in the Mac, in any case. OWC suggests the USB 2.0 port is a good solution for keyboards and mice, where throughput isn’t an issue.

It’s worth nothing the 3.0 port supplies only up to 0.9 amps (4.5 watts at 5 volts), which is enough to charge iPhones and other devices, but may not be enough power for some bus-powered external drives. Check your drive’s specs before attaching. The USB 2.0 port has just 0.5A (2.5W) available, which is fine for its intent.

owc tbolt 3 mini dock front OWC
Two HDMI 2.0 ports, USB 3.0, USB 2.0, and a gigabit ethernet connector.

The size, shape, and construction of the dock is top notch. With a metal case and 7-inch integral USB-C “tail”, it works well with both desktop and laptop Macs. While compact, the dock separates ports well enough that they are all usable likely without special cables. The one exception might be with an HDMI cable that has excessive plastic or rubber molding around its plug, though that’s rare.

With two displays plugged in and ethernet running full tilt in testing, the dock did heat up, though it wasn’t uncomfortable to touch. However, I’d be sure to place it on a surface that took advantage of its rubber feet on the bottom and not put items on top of it.

The only Mac with USB-C that this dock won’t work with is the discontunued 12-inch MacBook model, which had just USB support and not Thunderbolt 3.

The so-called Quick Start Guide included with the dock provides some basic information, including how to contact technical support, and a link to where to find the full manual online. However, because of a number of specifics it’s worth knowing about when using the dock, the single-sided sheet could easily have also included a summary of provisos—like resolutions supported, USB power limits, and the like—instead of asking a buyer to hunt for a PDF.

One note about the manufacture. OWC doesn’t make this dock. Instead, as is often the case except for major equipment companies, this is a “white-label” product designed and manufactured by a company that specializes in creating electronics that it labels for other companies. OWC puts its name on it, chooses its retail price, offers it for sale, and provides customer and technical support. A similar model of this dock has been available since 2018, including a version from CalDigit that currently costs $10 more. At OWC’s price, the set of features is even more of a bargain.

Bottom line

If you have want to add two 4K displays at the lowest cost and conserve USB-C ports, the OWC Thunderbolt 3 mini Dock offers the right set of options.

Join the newsletter!


Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Glenn Fleishman

Show Comments

Most Popular Reviews

Latest News Articles


PCW Evaluation Team

Cate Bacon

Aruba Instant On AP11D

The strength of the Aruba Instant On AP11D is that the design and feature set support the modern, flexible, and mobile way of working.

Dr Prabigya Shiwakoti

Aruba Instant On AP11D

Aruba backs the AP11D up with a two-year warranty and 24/7 phone support.

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers


This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang


It really doesn’t get more “gaming laptop” than this.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?