Can't extend two different screens on macOS

ABC/ABA/AAB (Extend) Display Mode is not supported on macOS, This hub only supports SST mode under macOS and can only extend 1 monitor.

Product does not work as intended？

Before purchasing, make ensure your computer's USB-C port supports DisplayPort Alt Mode, as this is required for the adapter to transmit video signals to external monitors

Can't extend two different screens ?

macOS only supports mirror mode (AAA, ABB mode), It does not support Extended mode（ABC, ABA, AAB Mode).

Why product is not compatible with device ?

Ensure your laptop's USB-C support displayport ALT mode , Kindly note that a single display can support up to 4K@60hz, but in MST mode, dual displays can only support up to 4K@30hz.

1. Adjust the laptop's output resolution to a lower setting or verify the cable connection. 2. replace a newer 4K@60hz UHDTV or or laptop compatible with the DP 1.4 standard or Thunderbolt 3 Note: A display up to 4K@60hz, dual displays up to 4k@30hz

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KOZYC USB C to Dual HDMI Adapter 4K@60hz, Type C to HDMI Splitter Extended Display for MacBook/MacBook Pro Air Dell XPS13/15, Samsung Galaxy S9/S9+ (MST Only Support Windows OS)

KOZYC USB C to Dual HDMI Adapter 4K@60hz, Type C to HDMI Splitter Extended Display for MacBook/MacBook Pro Air Dell XPS13/15, Samsung Galaxy S9/S9+ (MST Only Support Windows OS)

Product ID: 581554629

Details

Brand
KOZYC
Colour
Silver
Compatible devices
Laptops
Hardware interface
HDMI USB Type
Special features
4K@60Hz

⚡Thunderbolt 3 & DP Alt Mode support

🔌Plug & Play, no drivers

🖥️4K@60Hz single display

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€ 44.15

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Double your screens, double your impact!

COMPACT POWERHOUSE - Sleek, lightweight design fits perfectly in your tech arsenal without adding bulk or clutter to your workspace.
CRYSTAL CLEAR 4 K VISUALS - Experience stunning 4K resolution at 60Hz on a single display for ultra-sharp, professional-grade visuals.
ZERO HASSLE INSTALLATION - Plug & play design means no drivers or external power—just connect and elevate your productivity instantly.
EFFORTLESS DUAL DISPLAY SETUP - Extend your workspace seamlessly with dual HDMI outputs supporting up to 4K@30Hz, perfect for multitasking pros.
TRUSTED RELIABILITY SUPPORT - Backed by a 2-year warranty and lifetime technical support, ensuring your setup stays smooth and stress-free.

The KOZYC USB C to Dual HDMI Adapter delivers crisp 4K@60Hz output on a single display and supports dual extended displays at 4K@30Hz. Compatible with Thunderbolt 3 and DP Alt Mode devices, it offers plug-and-play convenience without extra power or drivers. Ideal for MacBook, Dell XPS, and select Samsung Galaxy models, this compact adapter is a must-have for professionals seeking efficient multi-screen setups backed by a 2-year warranty and lifetime support.

Specifications

ASIN	B0CG5W614X
Additional Features	4K@60Hz
Best Sellers Rank	#48,182 in Computers ( See Top 100 in Computers ) #78 in DVI to HDMI Adapters
Brand	KOZYC
Cable Length	2.7 Inches
Color	Silver
Compatible Devices	Laptops
Customer Reviews	4.1 4.1 out of 5 stars (1,172)
Enclosure Material	Plastic
Global Trade Identification Number	04897131960077
Hardware Interface	HDMI, Thunderbolt, USB Type C
Item Weight	35.8 Grams
Manufacturer	KOZYC
Mfr Part Number	K2AD12UH
Model Number	K2AD12UH
Number of Ports	2
Operating System	Windows, macOS, Linux, Android
Total Usb Ports	2
Unit Count	1.0 Count

Reviews

N**N

Fonctionne bien

28.01.2026

J**T

Works fantastic!

9.04.2026

B**R

Yes I can confirm this works extremely well and it was pretty cheap compared to the other options, did not overheat at all, the connector was strong and the picture quality was as expected with no delay at all. The problem arose when I tried connecting it to the usb a port using a/an converter/adapter but it did not work. I think no stars should be deducted off this product as it was not intended to work with a/an connector/adapter and might also be the connector/adapter's fault, but in all it does not work with a/an connector/adapter, but works well with an usb c output port, the great lads at amazon helped me by accepting this return so kudos to them 👏

10.12.2024

L**A

Top Produkt fürs Homeoffice. Leichte Anwendung, Plug in and Go. Keine Verbindungsabrüche. Bild Qualität wird optimal Übertragen.

12.01.2026

A**8

Génial, grâce à cet appareil je peux être en triple écran facilement en un seul branchement, pas besoin de socle pour le pc portable comme par le passé pour avoir les deux prises pour les écrans... une révolution bien agréable!!!

21.04.2026

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The product quality is outstanding. Exactly what I needed for my work.

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€ 44.15

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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