Mac WeChat Dual Open

Create a second WeChat instance on macOS for running two accounts simultaneously.

Core Method

The underlying mechanism is simple — macOS distinguishes apps by their bundle identifier. By copying WeChat, changing the copy's bundle ID, and re-signing it locally, macOS treats the copy as a separate app that can run alongside the original:

1. Copy /Applications/WeChat.app to ~/Applications/WeChat-2.app.
2. Change the copy's CFBundleIdentifier (e.g., to com.tencent.xin2).
3. Re-sign the copy with codesign --force --deep --sign -.
4. Launch the copy via its executable directly.

No third-party injection tools or modified binaries required.

Prerequisites