Storage Performance
Professional Storage Device Analysis & Benchmarking for macOS
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About
Storage Performance is a comprehensive macOS application that analyzes USB and storage devices, providing detailed device information and performance benchmarking. Built with SwiftUI, it offers professional-grade storage testing capabilities with an intuitive interface.
Features
🔍 Device Discovery
Automatic scanning of USB controllers, devices, and storage drives with hierarchical tree display.
⚡ Performance Testing
Sequential and random read/write speed tests with real-time progress monitoring.
📊 USB Speed Analysis
Compares actual performance against theoretical USB speed limits with efficiency calculations.
📋 Detailed Information
Comprehensive device specs including vendor IDs, BSD names, mount points, and file systems.
System Requirements
- Operating System: macOS 11.0 (Big Sur) or later
- Architecture: Intel or Apple Silicon Mac
- Permissions: System access for device information
- Storage: Requires write access to test storage devices
How to Use
- Launch the Application: Storage Performance will automatically scan for connected devices on startup.
- Browse Devices: Select any device from the sidebar to view detailed information including USB specifications and storage details.
- Run Performance Tests: Click "Run Performance Test" for storage devices to benchmark read/write speeds and efficiency.
- Analyze Results: Review performance metrics, USB speed efficiency, and detailed test logs.
Understanding Test Results
Speed Measurements: All speeds are displayed in MB/s (megabytes per second) for both read and write operations.
Efficiency Rating: Shows how well your device performs compared to its theoretical USB maximum speed. Higher percentages indicate better performance.
USB Standards Supported: From Low Speed (1.5 Mbps) through SuperSpeed+ Gen 2x2 (20 Gbps), with automatic detection and theoretical limit calculation.
Test File Size: Default 256MB test file ensures accurate performance measurement while minimizing test duration.
Troubleshooting
| Issue | Solution |
|---|---|
| No devices showing | Click "Refresh Devices" or restart the app. Ensure USB/storage devices are properly connected. |
| Performance test fails | Verify the device has sufficient free space (at least 1GB recommended). Check write permissions. |
| Slow device detection | Large numbers of USB devices may take longer to scan. Wait for the scan to complete. |
| Missing device information | Some device details may not be available for certain hardware. This is normal behavior. |
| Permission errors | Grant the app necessary permissions in System Preferences > Security & Privacy. |
Privacy & Security
Storage Performance operates entirely on your local machine and does not transmit any data over the network. The app:
- Only accesses system device information through standard macOS APIs
- Creates temporary test files only during performance testing
- Does not collect, store, or transmit personal information
- Requires only necessary system permissions for device analysis
Support
For additional support, feature requests, or bug reports, please contact: jamespaulmoriarty@proton.me