Advanced Apple Debugging & Reverse Engineering

Introduction

The book «Advanced Apple Debugging & Reverse Engineering» by Derek Selander is not just another debugging guide, but a full-fledged immersion into the world of low-level application analysis on Apple operating systems. Published in 2018, it remains a relevant resource for anyone who wants to understand how applications on iOS and macOS actually work, and how to look under the hood of the system using tools such as LLDB, Hopper Disassembler, and IDA Pro.

The book is aimed at experienced developers who are already familiar with the basics of Swift and Objective-C, but want to go beyond ordinary debugging and learn how to analyze someone else's code, find vulnerabilities, modify application behavior, and even reconstruct program logic without source code. This is not a textbook for beginners — it is an advanced course for those ready to dig deep.

What the book is about

The book consists of 476 pages divided into 20 chapters, each dedicated to a specific aspect of debugging or reverse engineering. The main focus is on practical examples and real-world scenarios. The author consistently guides the reader from basic techniques of working with the LLDB debugger to complex methods of binary code analysis and on-the-fly application modification.

Key topics include:

• Setting up and using LLDB for advanced debugging (breakpoints, expression, memory modification).
• Working with Hopper Disassembler and IDA Pro for static analysis of binary files.
• Reverse engineering Objective-C and Swift runtime: understanding metadata, selectors, methods.
• Analysis and modification of Apple system frameworks.
• Using tools for application hacking and protection (Theos, Cycript, Frida).
• Practical examples: debugging third-party applications, finding vulnerabilities, patching.

Who this book is for

The book is intended for:

• iOS/macOS developers wishing to deepen their knowledge in debugging and performance.
• Security professionals involved in application analysis and vulnerability discovery.
• Reverse engineers working with the Apple platform.
• Enthusiasts interested in low-level programming and the internal structure of Apple systems.

What the reader will learn

After reading the book, the reader will be able to:

• Set up and use LLDB for complex debugging scenarios, including conditional breakpoints and scripts.
• Analyze binary files using Hopper and IDA Pro, reconstructing function logic.
• Understand the internal structure of Objective-C and Swift runtime, including working with metadata and dynamic dispatch.
• Modify application behavior without source code using patching and code injection.
• Use reverse engineering tools such as Theos, Cycript, and Frida.
• Find and exploit typical vulnerabilities in Apple applications.
• Apply the acquired knowledge to improve the security of their own projects.

Strengths of the book

One of the main advantages of the book is its practical focus. Each chapter contains numerous code examples and step-by-step instructions that can be immediately tested on real projects. The author does not just explain theory, but shows how to apply tools in practice, which is especially valuable for such a complex topic as reverse engineering.

Furthermore, the book is written in a lively and accessible language, despite the complexity of the material. Derek Selander knows how to explain complex concepts in simple terms without falling into excessive academicism. The structure of the book is logical and consistent: from simple to complex, allowing the reader to gradually build up their competencies.

Special mention should be made of the abundance of screenshots and diagrams that help visualize the processes occurring in the debugger or disassembler. This greatly facilitates understanding