Unlike generic storage benchmarking tools that measure raw, abstract read and write speeds, this utility specifically tests a drive’s performance in relation to . It tells you exactly which video formats, resolutions, and framerates your storage can handle seamlessly without dropping frames. Key Features
You want to install the software on a Mac that isn't signed into an Apple ID.
The easiest and safest way to download the application is directly through Apple's ecosystem. Open the on your macOS device. Search for "Blackmagic Disk Speed Test" . Click Get and then Install . blackmagic disk speed test mac download dmg
| Tool | Best For | Key Feature | | :--- | :--- | :--- | | | General performance (sequential + random) | Tests QD1 and QD8 for a more complete performance picture. | | AJA System Test Lite | Video production | Similar to Blackmagic but with slightly different file size options. | | ATTO Disk Benchmark | Technical in-depth testing | Good for enterprise or pro users who need granular block size testing, but it only tests sequential speeds. |
If you want to troubleshoot a slow external drive, I can show you how to or recommend the best formatting options for macOS speed optimization. Which drive model are you testing? Share public link Unlike generic storage benchmarking tools that measure raw,
: Click the large "Start" button in the center.
Typical for older, mechanical external USB hard drives. Good for basic backups, but too slow for modern video editing or running active apps. The easiest and safest way to download the
This panel breaks down exactly how many frames per second (FPS) your drive can read and write for specific formats. For example, a modern internal Mac Studio SSD might show hundreds of FPS for 4K video, proving it can handle multi-cam editing with ease. Benchmarks: What Speed Do You Actually Need?
This panel lists common video formats like ProRes 422 HQ and Cinema DNG RAW across standard resolutions. If a green checkmark appears next to a format, your drive is fast enough to handle it. If a red "X" appears, your drive will bottleneck during playback or rendering. 3. "How Fast?" Panel