it'll continue to benchmark the drive until you stop it permissions. and space to write test files. YouTube·Macintosh Weekly Blackmagic Speed Test Demo – Read/Write Speeds Matter!
If you are troubleshooting a specific drive issue, let me know: Is the drive you are testing ? What brand and model is the drive? What exact read/write speeds are you currently getting? Share public link
When you first open Disk Speed Test from your Applications folder, macOS may show a warning: “Disk Speed Test cannot be opened because it is from an unidentified developer.”
The dual gauges display your drive's performance in Megabytes per second (MB/s).
A: Force quit the app (Command-Option-Esc) and restart your Mac. If the problem persists, uninstall and reinstall a fresh copy from the Mac App Store. blackmagic disk speed test mac download dmg
Measures how fast data can be saved to your storage drive. This is crucial for capturing live video streams or transferring large files to your Mac.
This is the primary distribution method. You can find it by searching for Blackmagic Disk Speed Test in the App Store, which ensures you receive automatic security updates.
By clicking the gear icon, users can select any connected internal or external drive (SSD, HDD, or RAID) to benchmark.
If you chose to download the .dmg file from the website, follow these steps to install it: it'll continue to benchmark the drive until you
If you do not strictly need a DMG file for deployment, the easiest way for standalone users to get the tool is directly from Apple: Open the app on your Mac.
This section provides specific frame rate capabilities for different video formats. It tells you exactly how many frames per second (FPS) your drive can read or write for targeted video configurations. If you are shooting 4K video at 60 FPS, you can check this column to verify if your storage can handle the data throughput. Troubleshooting Common Disk Speed Issues
: It tests drives using video frames rather than abstract file sizes.
The Ultimate Guide to Blackmagic Disk Speed Test for Mac: How to Download the DMG and Benchmark Your Drive If you are troubleshooting a specific drive issue,
There are two primary ways to get this software on your Mac. While the Mac App Store is common, many users prefer the standalone installation. Method 1: The Mac App Store (Recommended) Open the on your Mac. Search for "Blackmagic Disk Speed Test." Click Get and then Install. This version is automatically updated by Apple. Method 2: Blackmagic Design Support Page
If your external drive is performing significantly slower than advertised, ensure you are using a certified and that it is plugged directly into a high-bandwidth port on your Mac rather than a generic USB hub.
Testing your storage performance helps you optimize your workflow and troubleshoot hardware issues:
Once the DMG file finishes downloading:
| 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. |