How to use GPU acceleration

Enable hardware acceleration

LosslessConverter detects compatible CPU and GPU hardware and uses available acceleration for supported decoding, processing, and encoding tasks. Availability depends on the source, output codec, hardware, and operating system.

On Windows

1. Install and open LosslessConverter.
2. Choose Help > Preferences.
3. Enable Acceleration.
4. Review the detected hardware and the available H.264 and HEVC encoder and decoder capabilities.

On macOS 27

Use the current Mac app on a Mac compatible with macOS 27. LosslessConverter has been verified to support macOS 27. Choose the output profile you need and review the hardware options available in that Mac build; the preferences screenshot above shows the Windows interface.

Core conversion and media processing are available on Mac. AI tools are currently Windows-only. Review the hardware and platform requirements for the selected task.

Run the task with acceleration

1. Return to the main window.
2. Add one representative source file and choose the intended output settings.
3. Select Convert, Compress, or Start All. LosslessConverter will use compatible acceleration for the active workflow.
4. Open the result and check picture, audio, and sync before applying the settings to a full batch.

If acceleration is unavailable

• Check both codecs: the source decoder and output encoder have separate requirements. The file extension alone does not identify either one.
• Check the active processing: encoding, effects, and subtitle rendering may use different hardware paths. A supported GPU does not accelerate every operation.
• Check your platform: update the app, use the detected options for your hardware, and follow the Windows driver steps or macOS update steps below.

If the same job still fails, contact support with the app version, operating system, chip or GPU, source and output codecs, selected profile, and any error message.

Identify your graphics hardware on Windows

1. Open Control Panel > Hardware and Sound > Device Manager.
2. Expand Display adapters.
3. Double-click the adapter and open the Driver tab to see the provider, version, and date.

Download Windows drivers only from the computer manufacturer or the official GPU vendor.

Check graphics and updates on macOS 27

Identify your Mac hardware

1. Choose Apple menu > About This Mac and note the chip and macOS version.
2. Hold Option and choose Apple menu > System Information.
3. Select Graphics/Displays in the sidebar and review the graphics information.

Apple explains how to find these details in its System Information instructions. Use the reported hardware when checking LosslessConverter requirements.

Keep macOS 27 up to date

1. Choose Apple menu > System Settings > General > Software Update.
2. Install the updates offered for your Mac and restart when requested, then reopen LosslessConverter.

Mac graphics drivers are delivered with macOS. Use Apple Software Update for your Mac; the NVIDIA, AMD, and Intel Windows driver installers below do not apply to macOS.

Update an NVIDIA driver on Windows

1. Open the official NVIDIA driver page.
2. Select the product type, series, model, and operating system, then choose Find.
3. Review the latest appropriate Game Ready or Studio driver and choose Download.
4. Run the downloaded installer, follow its instructions, and restart Windows.

Update an AMD driver on Windows

1. Open the official AMD driver support page.
2. Use the auto-detect tool on supported current Windows systems, or search and browse by product.
3. Choose the correct operating-system package and download it.
4. Run the setup wizard and restart Windows after installation.

Update an Intel graphics driver on Windows

1. Open the official Intel Driver & Support Assistant page.
2. Choose Download now.
3. Run the installer and select Begin Installation.
4. After installation completes, restart Windows and reopen LosslessConverter.