Mac WeChat Dual Open

Core Judgment

Prefer the copy + bundle id + ad-hoc signing method over injection/tweak tools when the user wants a cleaner second WeChat:

1. Copy /Applications/WeChat.app to a user-owned app such as ~/Applications/WeChat-2.app.
2. Change only the copy's CFBundleIdentifier, usually to com.tencent.xin2.
3. Re-sign the copy with codesign --force --deep --sign -.
4. Stop and have the user open the prepared copy manually. The agent never launches WeChat.

This is generally workable, but not permanent. Updates, push notifications, keychain isolation, Gatekeeper/signing policy, and Tencent-side app checks can break or degrade it. Read references/reliability-and-risks.md when evaluating a public tutorial or explaining tradeoffs.

Prerequisites

• macOS 12+ with WeChat installed at /Applications/WeChat.app
• Python 3.10+ (system python works)
• Pillow: required for recolor-icon. Install with pip3 install Pillow if missing.
• Xcode Command Line Tools: xcode-select --install provides codesign, iconutil, sips.