XNU Image Tools

Multi-platform image generation and fuzzing toolkit for iOS, watchOS, and Mac Catalyst. Generates diverse baseline images across platforms, then fuzzes them with ICC profile embedding across 22 output formats targeting Preview, Safari, iMessage, Mail, and Notes.

Workflow

1. Generate baseline images with xnuimagetools (iOS, watchOS, Mac Catalyst)
2. Fuzz with xnuimagefuzzer (--pipeline, --chain, --input-dir)
3. Embed ICC profiles (clean + mutated)
4. Feed to target apps: Preview, Safari, iMessage, Mail, Notes
5. Collect crashes from ~/Library/Logs/DiagnosticReports/

Components

Component	Platform	Language
XNU Image Fuzzer	macOS (Mac Catalyst)	Objective-C
XNU Image Generator for iOS	iOS	Swift
XNU Image Generator for Watch	watchOS	Swift
VideoToolbox Interposer	iOS / macOS	Objective-C

Quick Start

# Open workspace in Xcode, update Team ID, select scheme, Run
open "XNU Image Tools.xcworkspace"

Platform Support

Platform	Status
macOS 15+ (arm64, x86_64)	✅
iOS / iPadOS 18+	✅
watchOS 11+	✅
visionOS 2.x	✅

Sample Output

iOS / Mac / Vision Pro

watchOS

Documentation

• Copilot Instructions — build commands, architecture, debug env vars
• XNU Image Fuzzer — primary fuzzer repo
• VideoToolbox Fuzzer — VideoToolbox interposer docs