VirtualBuddy is a macOS-native virtual machine manager built on Apple's Virtualization framework. It allows developers to create, configure, run, and manage macOS and Linux virtual machines on Apple Silicon hardware, primarily for testing applications across different macOS versions. The system provides a full SwiftUI/AppKit GUI, a command-line tool (vctool), an XPC service for device restoration, and a guest application that runs inside VMs for clipboard sharing, file transfers, and configuration import. It manages the complete VM lifecycle: provisioning from IPSW restore images or Linux ISOs, hardware configuration (CPU, memory, storage, network, USB passthrough), boot/pause/resume, saved session save/restore with atomic file operations, and enterprise managed preferences via MDM. The architecture is modular with separate frameworks (VirtualCore, VirtualUI, VirtualWormhole, DeepLinkSecurity, VirtualInstallation) and a clear separation between UI, logic, and communication layers. External dependencies include Sparkle for updates, VMBridge for guest-host communication, and Apple's private MobileDevice framework for device restoration. The codebase exhibits high craftsmanship with well-structured concurrency (async/await, actors, Combine), extensive use of SwiftUI patterns, and robust state machines for session lifecycle and installation. However, heavy reliance on private Apple APIs and version-conditional compilation introduces medium technical drift risk, and the overall complexity is significant.