The Svalt D is a MacBook dock with a unique feature - a built in cooling fan that's designed to keep a MacBook's temperature down when used in clamshell mode with an external monitor. Keeping the MacBook cool helps prevent processor throttling due to the high temperatures a MacBook is subjected to when in clamshell mode.

We went hands-on with the Svalt D to test the claims that it reduces temperature and speeds up performance, and we were impressed with how it worked.


Made up of a two-pound block of aluminum, the Svalt D is an attractive, sturdy stand that matches well with Apple's line of MacBooks. The Svalt D houses a small stand that moves air through a MacBook, and thanks to an adjustable rubber foot, it's compatible with all of Apple's notebooks.

To test the Svalt D, we exported two different videos from a MacBook, with and without the dock. Without using the dock, exporting a video took 15 minutes and caused the temperature of the MacBook to rise to 121 degrees Fahrenheit. With the stand, our video exported in 14 minutes and the stand kept the MacBook at 105 degrees Fahrenheit, a 16 degree difference.

Our one complaint about the Svalt D concerned the two modes of the fan. There's a normal mode and a silent mode, but switching between them requires using a special standalone cable, which is a bit of a hassle and an extra expense. Luckily, both modes are relatively quiet and don't make as much noise as a MacBook fan, but the silent mode is definitely a better choice for users who want the quietest possible performance.

In our opinion, the Svalt D is a solid dock that lives up to its claims, keeping your MacBook cool when it's used with an external monitor. The Svalt D is available in Silver and Black and can be purchased from the Svalt D website for $149.95. The Silence Adapter is available for $8.95.

Note: MacRumors received no compensation for this review.

Top Rated Comments

DogHouseDub Avatar
96 months ago
USB powered fan by Thermaltake - $15

Ikea napkin holder - $2

done :-)

regarding where the air is blowing - the bottom case draws heat away from the components so it can be more efficiently dissipated (much like an audio amplifier). Keeping the air moving along the bottom of the case is a great way to decrease the internal temp - no need to force air inside the case itself, IMO. Even resting the Macbook upside down can help substantially.
Score: 6 Votes (Like | Disagree)
swrobel Avatar
96 months ago
So, just to be clear, this thing isn't a dock by any definition. It's a stand with a fan.
Score: 4 Votes (Like | Disagree)
ckWTB Avatar
96 months ago
I hope the following information helps clarify a few things:

Silence Adapter
The Silence Adapter is an optional accessory for sound sensitive environments, it is not a standard accessory or required for typical office environments.

Laptop Cooling Configuration
The laptop’s active built-in cooling system is the laptop’s primarily method of cooling. The 15-inch MacBook Pro with Retina Display includes two large cooling fans that exhaust hot air out at both ends of the rear vent located under the screen hinge. A primary cool air intake is located at the center of the rear vent (between the two exhaust vents). A heat sink attaches to the CPU/GPU chips and transfers heat through a heat pipe to heat radiators located at the fan exhausts. The current 13-inch Retina differs from the 15-inch Retina model in that it has a single large fan on one side of the rear vent, while the older 13-inch Retina have two smaller fans. The 13-inch and 11-inch MacBook Airs have a single small fan on one side of the rear vent.

In addition to the active cooling, aluminum laptops also uses passive cooling through the laptop’s aluminum enclosure that functions as a large heat sink. The enclosure absorbs heat from the internal heat generating components (processors typically contributes the most heat) and then transfers that heat to passing air or other nearby heat sinks. This passive cooling is a secondary method of cooling, with slower and smaller contributions to cooling the CPU/GPU components.

By driving cooling air directly onto the CPU/GPU chips through the laptop’s primary intake you can achieve immediate and significant cooling. There is an air gap between the fans and exhaust vents through which the waste heat is driven out, so that the internal fans do not spin fans and exhaust their waste heat as normal. Overall this airflow supports and supplements the laptop’s built in cooling system.

If you want to see the layout of cooling and other laptop components for yourself then I recommend check out iFixit://www.ifixit.com/Device/Mac_Laptop (http://www.ifixit.com/Device/Mac_Laptop)
Score: 4 Votes (Like | Disagree)
SnarkyBear Avatar
96 months ago
$150??!? For that price I expect a TOP QUALITY dock.

But then you have to pay extra for an external converter for silence mode? Because installing a switch would have been WAY to complex and costly? And the external attachment that you have to switch in and out manually?

Seems bush-league to me. Something I would expect on a $8.99 dock from Walmart.
Score: 3 Votes (Like | Disagree)
brand Avatar
96 months ago
When is a dock not a dock? When it is a SVALT D.
Score: 3 Votes (Like | Disagree)
brand Avatar
96 months ago
I hope the following will help clear up the use of the term performance cooling dock: A dock is a structure designed to connect one object that is typically mobile (a laptop) to another object that is typically stationary (desktop workstation) for the purpose of moving substances between the two objects, such as loading cargo onto a ship, loading packages onto a truck, sending astronauts from a space station to an escape vessel, sending electricity through cables to power an electronic device, or sending cool air through an aluminum cradle heat sink into a laptop. The laptop is docked within the SVALT D to move cool air from the dock into the laptop. The SVALT D is a performance cooling dock in which all aspects of the device has been designed to effectively send cooling air into the laptop, such as the cradle’s shape and exhaust vent padding have been designed specifically to mate and seal around a MacBook air intake vent.
That is a stretch if there ever was one.
Score: 2 Votes (Like | Disagree)

Popular Stories

iPhone Measure Height

Newer iPhones Allow You to Measure Someone's Height Instantly — Here's How

Saturday December 3, 2022 10:23 am PST by
iPhone 12 Pro and Pro Max, iPhone 13 Pro and Pro Max, and iPhone 14 Pro and Pro Max models feature a LiDAR Scanner next to the rear camera that can be used to measure a person's height instantly in Apple's preinstalled Measure app. To measure a person's height, simply open the Measure app, point your iPhone at the person you want to measure, and make sure they are visible on the screen from...
iOS 16

When Will iOS 16.2 Be Released?

Friday December 2, 2022 2:13 pm PST by
Apple in late October began testing iOS 16.2 and iPadOS 16.2 updates, providing betas to both developers and public beta testers. As of now, we've had four total betas, with the fourth beta having been released earlier this week. iOS 16.2 and iPadOS 16.2 are expected before the end of the year, and we thought we'd try to narrow down the launch timeline. With only four betas released since...
14 vs 16 inch mbp m2 pro and max feature 1

Major RAM Upgrade Coming to Next-Generation MacBook Pro

Friday December 2, 2022 2:03 am PST by
The next-generation MacBook Pro models could feature faster RAM, according to a recent report from a reliable source. MacRumors Forums member "Amethyst," who accurately revealed details about the Mac Studio and Studio Display before those products were announced, recently provided information about Apple's upcoming 14- and 16-inch MacBook Pro models. The new machines are expected to feature...
General iOS 16 Feature Yellow

iOS 16.2 for iPhone Launching This Month With These 8 New Features

Thursday December 1, 2022 8:44 am PST by
Apple plans to publicly release iOS 16.2 for the iPhone in mid-December, according to Bloomberg's Mark Gurman. The update remains in beta testing for now, with at least eight new features and changes already uncovered so far. iOS 16.2 introduces a number of new features, including Apple's new whiteboard app Freeform, two new Lock Screen widgets for Sleep and Medications, the ability to hide...
apple ar headset concept 1

Kuo: Apple Headset Shipments Potentially Delayed Until Second Half of 2023

Sunday December 4, 2022 7:38 am PST by
Mass shipments of Apple's long-rumored AR/VR headset may be delayed until the second half of 2023 due to unspecified "software-related issues," according to the latest information shared today by tech analyst Ming-Chi Kuo. Apple headset render by Ian Zelbo Kuo said mass shipments of components for the headset are still likely to begin in the first half of 2023, but he believes that mass...
Emergency SOS via Satellite iPhone YT

Apple's iPhone 14 Emergency SOS via Satellite Feature Saves Stranded Man in Alaska

Thursday December 1, 2022 4:37 pm PST by
With the launch of iOS 16.1, Apple rolled out a Emergency SOS via Satellite, which is designed to allow iPhone 14 owners to contact emergency services using satellite connectivity when no cellular or WiFi connection is available. The feature was put to the test in Alaska today, when a man became stranded in a rural area. In the early hours of the morning on December 1, Alaska State Troopers ...
iPhone 14 Pro Purple Side Perspective Feature Purple

iPhone 15 Pro Rumored to Have These 5 Exclusive Features

Saturday December 3, 2022 10:55 am PST by
While we're still around nine months away from Apple unveiling the iPhone 15 lineup, rumors already suggest that the higher-end Pro models will have even more exclusive features than usual compared to the standard models next year. There are currently at least five features rumored to be exclusive to iPhone 15 Pro models:A17 chip: iPhone 15 Pro models will be equipped with an A17 Bionic...
top stories 3dec2022

Top Stories: M2 Max Benchmark Leak, iPhone 15 Camera Rumor, and More

Saturday December 3, 2022 6:00 am PST by
With Black Friday and Cyber Week shopping events winding down and the calendar flipping over to December, our attention is starting to turn to 2023 and all of the Apple news we're expecting to see. This week saw an alleged benchmark leak for an "M2 Max" chip expected to make an appearance in upcoming Macs like the MacBook Pro early next year, as well as fresh rumors about the iPhone 15...
android apple fix rcs

Google Again Criticizes Apple for Not Adopting RCS for Messages App: 'Their Texting is Stuck in the 1990s'

Friday December 2, 2022 10:54 am PST by
Google is continuing on with its attempt to convince Apple to adopt the RCS messaging standard, publishing a new "it's time for RCS" blog post. Promoted heavily by Google, RCS or Rich Communication Services is a messaging standard that is designed to replace the current SMS messaging standard. It provides support for higher resolution photos and videos, audio messages, and bigger file sizes, ...
maxresdefault

Can't Get an iPhone 14 Pro? Here's Why You Should Wait for the iPhone 15 Ultra

Monday December 5, 2022 11:44 am PST by
Due to production issues at Apple supplier factories in China, the iPhone 14 Pro and iPhone 14 Pro Max are backordered and basically out of stock at every store. If you were planning to gift or receive an iPhone 14 Pro model for the holidays and didn't already get one, you're basically out of luck because they're gone until late December. Subscribe to the MacRumors YouTube channel for more ...