💾 dysk-mac - macOS Disk Utility

The ultimate command-line disk utility for macOS - Get detailed disk information, monitor storage usage, and manage your drives with beautiful emoji-enhanced output.

dysk-mac is a powerful command-line disk utility for macOS that provides detailed information about mounted disks, including usage statistics, disk types (SSD vs HDD), external drive detection, and beautiful emoji-enhanced output.

🚀 Quick Start

# Install with Homebrew
brew tap nudelx/dysk-mac
brew install dysk-mac

# Run the tool
dysk-mac

✨ Features

• 📊 Comprehensive Disk Information: View detailed information about all mounted disks with emoji-enhanced output
• 🔍 Advanced Filtering: Filter disks based on usage percentage, free space, disk type, and more
• 📈 Flexible Sorting: Sort results by any disk property (size, usage, free space, etc.)
• 📋 Multiple Output Formats: Display as beautiful table, JSON, or CSV for data analysis
• 💾 Smart Detection: Automatically detects SSD vs HDD, external drives, and removable media
• 🎯 macOS Optimized: Uses native macOS diskutil and df commands for maximum compatibility
• 🚨 Usage Warnings: Visual indicators for high disk usage (⚠️ for >70%, 🚨 for >90%)
• 🔌 External Drive Support: Special handling for external SSDs and hard drives

Installation

Option 1: Homebrew (Recommended)

Install via Homebrew tap:

brew tap nudelx/dysk-mac
brew install dysk-mac

Option 2: Manual Installation

1. Clone or download this repository
2. Install dependencies:

   npm install

3. Make the script executable:

   chmod +x index.js

4. (Optional) Create a global link:

   npm link

Usage

Basic Usage

Display all mounted disks in a formatted table:

./index.js
# or if globally linked:
dysk-mac

Command Line Options

Examples

1. Basic Disk Information

dysk-mac

Output:

┌────────────────┬────────────────────────────┬───────────┬───────────┬────────┬───────────┬──────┬──────────┐
│ Disk           │ Mount                      │ Size (GB) │ Used (GB) │ Used % │ Free (GB) │ Type │ External │
├────────────────┼────────────────────────────┼───────────┼───────────┼────────┼───────────┼──────┼──────────┤
│ /dev/disk3s1s1 │ /                          │ 460.4     │ 10.5      │ 5%     │ 249.9     │ HDD  │ No       │
│ /dev/disk3s6   │ /System/Volumes/VM         │ 460.4     │ 0.0       │ 1%     │ 249.9     │ HDD  │ No       │
│ /dev/disk3s5   │ /System/Volumes/Data       │ 460.4     │ 192.3     │ 44%    │ 249.9     │ HDD  │ No       │
└────────────────┴────────────────────────────┴───────────┴───────────┴────────┴───────────┴──────┴──────────┘

2. Filter Disks by Usage

Show only disks with more than 70% usage:

dysk-mac --filter "usedPercent > 70"

3. Sort by Free Space

Display disks sorted by available free space (largest first):

dysk-mac --sort free

4. JSON Output

Get machine-readable JSON format:

dysk-mac --json

Output:

[
  {
    "filesystem": "/dev/disk1s1",
    "size": 500107862016,
    "used": 375080869888,
    "free": 125026992128,
    "usedPercent": 75,
    "mount": "/",
    "type": "SSD",
    "removable": false,
    "external": false
  }
]

5. CSV Output

Export data for spreadsheet analysis:

dysk-mac --csv

6. Combined Filtering and Sorting

Find external drives with low free space, sorted by usage:

dysk-mac --filter "external && free < 50e9" --sort usedPercent

Filter Expressions

The --filter option accepts JavaScript expressions that can reference any disk property:

Advanced Filter Examples

# Show only SSDs with high usage
dysk-mac --filter "type === 'SSD' && usedPercent > 90"

# Show external drives with less than 20GB free
dysk-mac --filter "external && free < 20e9"

# Show non-system drives (not mounted at /)
dysk-mac --filter "mount !== '/'"

# Show drives with more than 1TB total size
dysk-mac --filter "size > 1e12"

Output Fields

Requirements

• macOS (uses diskutil and df commands)
• Node.js 14+ (for ES modules support)

Dependencies

• cli-table3: For formatted table output
• yargs: For command-line argument parsing

License

MIT License - feel free to use and modify as needed.

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test thoroughly
5. Submit a pull request

Troubleshooting

Permission Issues

If you get permission errors, ensure the script is executable:

chmod +x index.js

No Output

If no disks are shown, check that you have mounted disks and the script has permission to run diskutil commands.

Filter Not Working

Make sure your filter expression is valid JavaScript. Common issues:

• Use && for AND, || for OR
• Use === for exact equality
• Numbers should be in bytes (use e9 for GB, e12 for TB)

For Developers

Setting up Homebrew Tap

To make this tool available via Homebrew, see HOMEBREW_SETUP.md for detailed instructions.

Quick setup:

./setup-homebrew.sh

Building from Source

git clone https://github.com/nudelx/dysk-mac.git
cd dysk-mac
npm install
chmod +x index.js
./index.js

🔍 Keywords & Search Terms

dysk-mac is optimized for these search terms:

• macOS disk utility
• Command line disk tool
• Disk usage monitor
• SSD HDD detection
• External drive utility
• macOS storage management
• Disk space analyzer
• Homebrew disk tool
• Terminal disk utility
• macOS disk information

📈 Performance & Compatibility

• Fast: Uses native macOS commands for optimal performance
• Lightweight: Minimal dependencies, small footprint
• Compatible: Works on macOS 10.15+ (Catalina and later)
• Reliable: Built with Node.js 14+ ES modules
• Secure: No external API calls, all local processing

🎯 Use Cases

• System Administrators: Monitor disk usage across multiple systems
• Developers: Check available space before builds or deployments
• Power Users: Manage external drives and storage devices
• DevOps: Integrate disk monitoring into automation scripts
• Data Analysts: Export disk data for analysis and reporting

🌟 Why Choose dysk-mac?

• Beautiful Output: Emoji-enhanced tables for better readability
• Smart Detection: Automatically identifies SSD vs HDD and external drives
• Flexible Filtering: Powerful JavaScript expressions for complex queries
• Multiple Formats: Table, JSON, and CSV output options
• Easy Installation: Simple Homebrew installation
• Active Development: Regular updates and improvements

📞 Support & Community

• Issues: GitHub Issues
• Discussions: GitHub Discussions
• Contributions: Contributing Guide

Made with ❤️ for the macOS community