mac-wechat-dual-open

Running two WeChat instances on macOS requires duplicating the app, assigning a unique bundle ID, and ad-hoc signing the copy. This lets you log into a second account simultaneously without injection tools.

Ad-hoc signing applies a local signature without a developer certificate, which is required to dual-open WeChat because changing the bundle ID invalidates the original signature and prevents the modified copy from launching.

Setting up a second WeChat app requires macOS 12+, Python 3.10+, and standard developer tools installed. These provide the codesign utilities and Python environment needed to modify and launch the duplicated application.

You visually distinguish the second WeChat app by recoloring its icon. The setup script uses the Pillow dependency to apply a distinct color to the copied app's icon, making it easy to identify the second instance in the Dock.

When the original WeChat app updates, the second instance may break. You use the script's repair command to inspect and fix the duplicated app, ensuring the bundle ID, ad-hoc signature, and icon settings remain functional after changes.

Yes, you can set a specific display language for the duplicated WeChat app. The creation process applies preferred language settings, such as Chinese, directly to the copied instance so it operates independently from the original app's language.