1. Product Overview
The Plugable UGA-HDMI-S is a versatile USB-C and USB 3.0 to HDMI adapter designed to connect an additional HDMI display to your computer. This adapter supports resolutions up to 2560x1440 (1440p) at 60Hz, making it suitable for extending your desktop for multitasking or mirroring your primary display. It features a hybrid 2-in-1 cable, allowing connection to either a USB 3.0 (USB-A) port or a USB-C port, including USB4, Thunderbolt 4, and Thunderbolt 3.

Image 1: Plugable USB-C/USB 3.0 to HDMI Adapter with both USB-A and USB-C connectors. The adapter features an HDMI output port, a USB 3.0 (USB-A) connector, and an attached USB-C adapter.
2. Setup and Driver Installation
Before connecting the adapter, ensure your operating system is compatible. The UGA-HDMI-S is compatible with Windows 10/11, macOS 10.14+ (including M1/M2/M3/M4 systems), and ChromeOS 100+.
2.1. Windows Installation
For Windows 10/11 systems, the necessary Silicon Motion (SMI) drivers typically install automatically upon connecting the adapter to an active internet connection. If automatic installation does not occur, please visit the Plugable support website for manual driver download and installation instructions.
2.2. macOS Installation
For macOS systems, manual driver installation is required using the InstantView application. Follow these steps:
- Open your web browser and search for "siliconmotion downloads" or visit the official Silicon Motion website.
- Locate and download the macOS InstantView Application compatible with your macOS version (e.g., macOS 14 Sonoma, 13 Ventura, 12 Monterey, 11 Big Sur).
- Double-click the downloaded file (e.g., a .dmg file) to open the installer.
- Drag the "macOS InstantView" app icon to your Applications folder.
- Navigate to your Launchpad or Applications folder, locate the "macOS InstantView" app, and double-click to launch it.
- If prompted, click "Open" to confirm you want to open an app downloaded from the internet.
- When prompted to grant access for screen recording, click "Open System Settings" (or "Open System Preferences" on older macOS versions).
- In the Privacy & Security settings, enable screen recording for the "macOS InstantView" application. You may need to enter your password and click "Modify Settings."
- Choose "Quit & Reopen" when prompted to apply the changes.
- Once the software is installed and configured, plug in your UGA-HDMI-S adapter to your Mac.
- If prompted, click "Allow" to connect the USB accessory to your Mac.
Video 1: This video demonstrates the step-by-step process of installing the InstantView application on macOS for the Plugable USB-C/USB 3.0 to HDMI Adapter.
3. Operating Instructions
After successful installation, the adapter will automatically detect and configure your connected HDMI monitor. You can then adjust display settings through your operating system.
3.1. Display Modes
- Extend Mode: Expands your desktop across multiple screens, allowing you to have different applications open on each display.
- Mirror Mode: Duplicates your primary display onto the external monitor.
To change display modes:
- Windows: Right-click on the desktop, select "Display settings," and configure your monitors.
- macOS: Go to System Settings (or System Preferences) > Displays to arrange and configure your monitors.
3.2. Multi-Monitor Setups
The UGA-HDMI-S adapter supports multi-monitor configurations:
- Windows and ChromeOS: Combine multiple adapters to support up to 8 displays.
- macOS: Supports up to 4 displays (one per adapter).

Image 2: A laptop connected to four external monitors via multiple Plugable adapters, showcasing an extended desktop setup for enhanced productivity.
Video 2: This short video illustrates how to set up multiple monitors with your Mac or PC using Plugable display adapters.
4. Specifications
| Feature | Detail |
|---|---|
| Model Number | UGA-HDMI-S |
| Connector Type | USB-C or USB 3.0 (USB-A) to HDMI |
| Max Resolution | 2560x1440 @ 60Hz (1440p) |
| Chipset | Silicon Motion (SMI) |
| Compatibility | Windows 10/11, macOS 10.14+, ChromeOS 100+ |
| Dimensions (LxWxH) | 5.5 x 4 x 0.75 inches |
| Item Weight | 3.84 ounces |
| Color | Black |
5. Troubleshooting
- Display Not Detected:
- Ensure the adapter is securely connected to both your computer's USB port and the monitor's HDMI input.
- Verify that the monitor is powered on and set to the correct HDMI input source.
- For macOS, confirm that the InstantView application is installed and screen recording permissions are granted (refer to Section 2.2).
- Try connecting the adapter to a different USB port on your computer.
- Restart your computer.
- No Driver Installation (Windows):
- Ensure your computer has an active internet connection for automatic driver installation.
- Manually download and install the latest drivers from the Plugable support website.
- Poor Display Quality or Performance:
- Check your display settings to ensure the resolution and refresh rate are configured correctly (up to 1440p@60Hz).
- Ensure you are using a high-quality HDMI cable.
- Close any unnecessary applications that might be consuming system resources.
- Note that this adapter is not recommended for gaming or graphics-intensive applications.
- Adapter is Warm to the Touch:
- It is normal for the adapter to become slightly warm during operation. If it feels excessively hot, disconnect it and contact support.
6. Maintenance
- Keep the adapter clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the adapter to extreme temperatures or humidity.
- Do not attempt to disassemble or repair the adapter yourself, as this will void the warranty.
7. Warranty and Support
Plugable products are designed for reliability and come with lifetime support from our North American team of connectivity experts. This device also includes a 2-year limited warranty.
For technical assistance, troubleshooting, or warranty claims, please visit the official Plugable support website or contact their customer service directly.
Plugable Support: https://plugable.com/support





