Dosu Logo
Home
Documents
macOS Process Collector
macOS Process Collector
Type
External
Status
Published
Created
Mar 8, 2026
Updated
Apr 3, 2026
Updated by
Dosu Bot

Overview#

The macOS Process Collector provides enhanced process monitoring capabilities specifically designed for macOS systems. It leverages well-maintained third-party crates to deliver comprehensive process metadata collection, security analysis, and system integration while maintaining safety and accuracy.

Key Features#

Enhanced Third-Party Crate Integration#

The macOS collector uses a carefully selected set of third-party crates instead of direct system calls:

  • sysinfo - Cross-platform process enumeration with macOS optimizations
  • security-framework - macOS Security framework integration for code signing and entitlements
  • core-foundation - Core Foundation API access for system integration
  • mac-sys-info - System information and SIP (System Integrity Protection) awareness

Safety and Reliability#

  • No unsafe code - All operations use safe Rust abstractions
  • Graceful error handling - Comprehensive error handling with structured error types
  • Graceful degradation - Continues with reduced functionality when APIs are unavailable
  • Sandboxing support - Handles macOS app sandboxing restrictions properly

Core Capabilities#

Process Enumeration#

The collector provides comprehensive process enumeration with macOS-specific enhancements:

use procmond::macos_collector::{EnhancedMacOSCollector, MacOSCollectorConfig};
use procmond::process_collector::ProcessCollectionConfig;

async fn example_macos_collection() -> Result<(), Box<dyn std::error::Error>> {
    let base_config = ProcessCollectionConfig::default();
    let macos_config = MacOSCollectorConfig {
        collect_entitlements: true,
        check_sip_protection: true,
        collect_code_signing: true,
        collect_bundle_info: true,
        handle_sandboxed_processes: true,
    };

    let collector = EnhancedMacOSCollector::new(base_config, macos_config)?;
    let (events, stats) = collector.collect_processes().await?;
    Ok(())
}

Security Analysis#

Entitlements Detection#

The collector analyzes process entitlements using path-based heuristics and Security framework integration:

  • System processes (/System/, /usr/) - Typically have system access, not sandboxed
  • App bundles (.app/) - Usually sandboxed with limited filesystem access
  • Other executables - Minimal entitlements assumed

Code Signing Validation#

Determines code signing status based on process characteristics:

  • System processes and app bundles - Assumed to be signed (typically by Apple)
  • Other executables - May be unsigned
  • Certificate validation - Basic validation through Security framework

System Integrity Protection (SIP)#

Detects SIP status and identifies SIP-protected processes:

  • SIP detection - Uses csrutil status command with fallback
  • Protected paths - Identifies processes in SIP-protected locations
  • Safe defaults - Assumes SIP enabled for security

Process Metadata Collection#

Basic Information#

  • Process ID (PID) and parent PID (PPID)
  • Process name and executable path
  • Command line arguments
  • Start time and collection timestamp
  • User ID and accessibility status

Enhanced Metadata#

  • CPU usage percentage
  • Memory usage (resident and virtual)
  • Memory footprint analysis
  • Process architecture detection
  • Bundle information extraction

macOS-Specific Attributes#

  • Entitlements analysis (debugging, system access, sandboxing)
  • SIP protection status
  • Code signing information
  • Bundle metadata (name, version, bundle ID)
  • Hardened runtime detection

Configuration Options#

MacOSCollectorConfig#

pub struct MacOSCollectorConfig {
    /// Whether to collect process entitlements information
    pub collect_entitlements: bool,
    /// Whether to check SIP protection status
    pub check_sip_protection: bool,
    /// Whether to collect code signing information
    pub collect_code_signing: bool,
    /// Whether to collect bundle information
    pub collect_bundle_info: bool,
    /// Whether to handle sandboxed processes gracefully
    pub handle_sandboxed_processes: bool,
}

Default Configuration#

impl Default for MacOSCollectorConfig {
    fn default() -> Self {
        Self {
            collect_entitlements: true,
            check_sip_protection: true,
            collect_code_signing: true,
            collect_bundle_info: true,
            handle_sandboxed_processes: true,
        }
    }
}

Architecture#

Component Structure#

The macOS collector is structured as follows:

  • EnhancedMacOSCollector - Main collector coordinating all subsystems
    • sysinfo System - Process Enumeration, Memory Information, CPU Usage
    • Security Framework - Code Signing, Entitlements
    • SIP Detection - csrutil Command, Path Analysis
    • Bundle Analysis - Bundle Name Extraction, App Bundle Detection

Data Flow#

  1. System Refresh - sysinfo refreshes process list
  2. Process Enhancement - Each process gets enhanced with macOS-specific metadata
  3. Security Analysis - Entitlements, code signing, and SIP status determined
  4. Bundle Processing - App bundle information extracted
  5. Event Generation - ProcessEvent objects created with comprehensive metadata

Error Handling#

Structured Error Types#

#[derive(Debug, Error)]
pub enum MacOSCollectionError {
    #[error("Security framework error: {0}")]
    SecurityFramework(String),
    #[error("System information error: {0}")]
    SystemInfo(String),
    #[error("Process filesystem error: {0}")]
    ProcessFs(String),
    #[error("Core Foundation error: {0}")]
    CoreFoundation(String),
}

Graceful Degradation#

The collector handles various failure scenarios gracefully:

  • Security framework unavailable - Falls back to path-based heuristics
  • SIP detection failure - Assumes SIP enabled for security
  • Process access denied - Continues with available processes
  • Sandboxing restrictions - Handles limited access scenarios

Performance Characteristics#

Target Metrics#

  • Process enumeration - < 5 seconds for 10,000+ processes
  • Memory usage - < 100MB during collection
  • CPU overhead - < 5% sustained during monitoring
  • Collection rate - > 1,000 processes per second

Optimization Features#

  • Efficient process lookup - Optimized sysinfo usage
  • Minimal API calls - Reduces system call overhead
  • Batch processing - Processes multiple items efficiently
  • Resource cleanup - Proper resource management

Integration with DaemonEye#

ProcessCollector Trait#

The macOS collector implements the standard ProcessCollector trait:

#[async_trait]
impl ProcessCollector for EnhancedMacOSCollector {
    fn name(&self) -> &'static str {
        "enhanced-macos-collector"
    }

    fn capabilities(&self) -> ProcessCollectorCapabilities {
        ProcessCollectorCapabilities {
            basic_info: true,
            enhanced_metadata: true,
            executable_hashing: false, // Future enhancement
            system_processes: true,
            kernel_threads: false, // Darwin kernel threads aren't surfaced by sysinfo
            realtime_collection: true,
        }
    }

    async fn collect_processes(
        &self,
    ) -> ProcessCollectionResult<(Vec<ProcessEvent>, CollectionStats)>;

    async fn collect_process(&self, pid: u32) -> ProcessCollectionResult<ProcessEvent>;

    async fn health_check(&self) -> ProcessCollectionResult<()>;
}

Event Generation#

ProcessEvent objects include comprehensive macOS-specific information:

use std::time::SystemTime;

fn example_process_event() -> ProcessEvent {
    ProcessEvent {
        pid: 1234,
        ppid: Some(1),
        name: "Safari".to_string(),
        executable_path: Some("/Applications/Safari.app/Contents/MacOS/Safari".to_string()),
        command_line: vec!["Safari".to_string()],
        start_time: Some(SystemTime::now()),
        cpu_usage: Some(5.0),
        memory_usage: Some(1024 * 1024),
        executable_hash: None, // Future enhancement
        user_id: Some("501".to_string()),
        accessible: true,
        file_exists: true,
        timestamp: SystemTime::now(),
    }
}

Testing and Validation#

Comprehensive Test Suite#

The macOS collector includes extensive testing:

Unit Tests#

  • Collector creation and configuration
  • Health check functionality
  • Process collection with various configurations
  • Error handling for edge cases

Integration Tests#

  • Cross-platform compatibility
  • Security framework capability detection
  • SIP status detection
  • Enhanced metadata collection
  • Graceful degradation scenarios

Property-Based Tests#

  • Process enumeration correctness
  • Metadata consistency
  • Error handling robustness

Example Test#

#[tokio::test]
async fn test_enhanced_macos_collector_collect_processes() {
    let base_config = ProcessCollectionConfig {
        max_processes: 10,
        collect_enhanced_metadata: true,
        ..Default::default()
    };

    let macos_config = MacOSCollectorConfig::default();
    let collector = EnhancedMacOSCollector::new(base_config, macos_config).unwrap();
    let result = collector.collect_processes().await;

    assert!(result.is_ok(), "Process collection should succeed");

    let (events, stats) = result.unwrap();
    assert!(!events.is_empty(), "Should collect at least one process");
    assert!(
        stats.successful_collections > 0,
        "Should successfully collect some processes"
    );
}

Deployment Considerations#

System Requirements#

  • macOS version - macOS 12.0+ (Monterey) recommended
  • Architecture - x86_64 and ARM64 (Apple Silicon) supported
  • Permissions - Standard user permissions sufficient for most operations

Security Considerations#

  • Privilege separation - Runs with minimal required privileges
  • SIP compliance - Respects System Integrity Protection
  • Sandboxing - Handles app sandboxing restrictions
  • Code signing - Compatible with macOS code signing requirements

Performance Tuning#

  • Collection frequency - Adjust based on monitoring requirements
  • Process limits - Configure maximum processes for large systems
  • Metadata collection - Enable/disable features based on needs

Future Enhancements#

Planned Features#

  • Executable hashing - SHA-256 hash computation for executables
  • Enhanced entitlements - More detailed entitlements parsing
  • Bundle metadata - Complete Info.plist parsing
  • Network correlation - Process-to-network event correlation

Security Framework Integration#

  • Advanced code signing - Detailed certificate chain validation
  • Keychain integration - Certificate and key information
  • Notarization status - Apple notarization verification

Performance Improvements#

  • Caching strategies - Process metadata caching
  • Incremental updates - Delta-based process monitoring
  • Parallel processing - Concurrent metadata collection

Troubleshooting#

Common Issues#

Security Framework Not Available#

Error: Security framework error: Framework not found

Solution: Ensure running on macOS with Security framework available. The collector will fall back to heuristics.

SIP Detection Failure#

Error: Failed to execute csrutil command

Solution: SIP detection will default to enabled for security. This is expected behavior.

Process Access Denied#

Error: Access denied for process 1234

Solution: Some processes may be inaccessible due to sandboxing or permissions. This is handled gracefully.

Debug Configuration#

Enable detailed logging for troubleshooting:

fn setup_debug_logging() -> Result<(), Box<dyn std::error::Error>> {
    let collector = EnhancedMacOSCollector::new(base_config, macos_config)?;

    // Enable debug logging
    tracing::subscriber::set_global_default(
        tracing_subscriber::fmt()
            .with_max_level(tracing::Level::DEBUG)
            .finish(),
    )?;

    Ok(())
}

Conclusion#

The macOS Process Collector provides a robust, safe, and comprehensive solution for process monitoring on macOS systems. By leveraging well-maintained third-party crates and implementing proper error handling, it delivers reliable process intelligence while respecting macOS security boundaries and system restrictions.
Key benefits:

  • Safety first - No unsafe code, comprehensive error handling
  • macOS native - Leverages macOS-specific features and APIs
  • Performance optimized - Efficient collection with minimal overhead
  • Future ready - Extensible architecture for new capabilities