Learn how to test Zoom Apps by running multiple instances on one computer and testing advanced features with guest mode and external users.

Testing Zoom Apps


## Running multiple instances of Zoom on one computer

To test some scenarios, including [Guest mode](/docs/zoom-apps/guides/guest-mode), you need to have multiple participants in the Meeting or Webinar.
One of options to simplify testing process is to run multiple instances of Zoom on the same computer.

## On Windows:

```shell
Zoom.exe --multipt=TRUE --data=data1
Zoom.exe --multipt=TRUE --data=data2
```

<Alert variant="danger">
**Note**

The value of `--data` must be a string starting with the word **data**.

For example, `--data`=**data**1234.
</Alert>

## On Mac:

1. Open applications or navigate to global applications folder /Applications.
2. Rename **zoom (zoom.us.app)** to **zoom2 (zoom2.us.app)**.
3. Install zoom again. (You can install **zoom** or **zoom2** for your local user).
4. Launch **zoom** and **zoom2**.
5. Use different accounts to sign in with both applications.

**Notes:**

- The main instance (**zoom**) will handle all deep links from the browser, so only that instance can use SSO.
- The second instance (**zoom2**) will not be updated automatically. To get a newer version, remove it and repeat the steps above.

## Testing advanced features

Some app features require special setup to test the unpublished app. For these, refer to guidance for the specific advanced feature.

## Beta testing with external users

To test unpublished apps with users outside of your developer account, you can [share private apps](/docs/distribute/sharing-private-and-beta-apps).
