# Accessibility and How to Install the Respondus Secure Browser

> Step-by-step guide to install the Respondus Secure Browser on Windows or Mac. Security tips, accessibility info & uninstall help included. Start now →

Source: https://support.kryterion.com/en_us/accessibility-and-how-to-install-the-respondus-secure-browser-ByivBLks1e

Last updated: 2026-08-06T22:29:16.695Z

## Security Considerations Before You Begin

To ensure the best performance during your online proctored exam, configure your security software to allow Respondus before launch. If you are on a work computer, reach out to your system administrator for help with the following:

*   Whitelisting **webassessor.com**
*   Opening ports **443** and **80**
*   Resolving conflicts with security applications that block **Lockdown Browser OEM** from running

Certain programs that access your camera or share your screen may also interfere with the secure browser. Close or disable the following before launching your exam (this list is not exhaustive):

*   Pop-up blockers
*   VMware / Bootcamp
*   Skype
*   Photobooth
*   TeamViewer
*   Any screen-sharing application
*   Any third-party camera application

If issues persist after addressing the above, you may need to temporarily disable your firewall and antivirus software. This should only be done with caution and as a final measure. Kryterion, a trusted provider in online proctoring, recommends the following approach:

1.  **Try all other options first.** Add exceptions within your existing security programs before considering a full disable.
2.  **Disconnect from other networks before disabling.** If you must turn off your firewall for testing purposes, do so only after disconnecting from all other networks, just as you would when sitting for your actual exam.
3.  **Re-enable your security software immediately after the session.** Once your exam ends and the secure browser closes, turn your firewall and antivirus back on right away.

**Note:** After your exam is complete, you are solely responsible for re-enabling any programs that were turned off to avoid ongoing conflicts with your device.

## Secure Browser Accessibility

If you would like to review accessibility details about the secure browser prior to installation, that information is available [here](https://support.respondus.com/hc/en-us/articles/4409595429659).

## Install the Respondus Secure Browser on Windows

1.  Sign in to your computer as a **System Administrator**.
2.  Close **all open applications**, then log into your Webassessor account.
3.  Navigate to the **My Assessments** tab and click the **Install Secure Browser** button.  
    **Note:** This button is only active when you are enrolled in an exam.
4.  Follow the prompt based on your browser:
    *   **Internet Explorer:** Click **Run**.
    *   **Chrome:** Click **LockDownBrowserOEMSetup.exe**.
    *   **Firefox:** Click **Save File**. Once the download finishes, double-click **LockDownBrowserOEMSetup.exe**.
5.  When prompted with _"Do you want to allow this app to make changes to your device?"_, click **Yes**.
6.  The Respondus Installer will open. Select your preferred language and click **Next**.

![Respondus installer showing language selection screen on Windows](https://cdn.kustomerhostedcontent.com/media/67995a4f39b1628aae5f25cd/b915b831e2964f62d96d4defc6352187.png)

7.  Allow the installation to run until it completes.

![Respondus installation progress bar on Windows](https://cdn.kustomerhostedcontent.com/media/67995a4f39b1628aae5f25cd/7ddf694bf34f99e91567d518fd7b5851.png)

8.  Click **Finish** to finalize the installation.

![Respondus installation complete screen showing the Finish button on Windows](https://cdn.kustomerhostedcontent.com/media/67995a4f39b1628aae5f25cd/a2f7a4987827b483e2b9ef08f96e6839.png)

## Install the Respondus Secure Browser on Mac

1.  Sign in to your computer as an **Administrator**.
2.  Close **all open applications**, then log into your Webassessor account.
3.  Go to the **My Assessments** tab and click the **Install Secure Browser** button.
4.  Follow the prompt based on your browser:
    *   **Safari:** Installation will begin automatically. If it does not, double-click the **Respondus Secure Browser (x64c)** package.
    *   **Firefox:** Select **Save**. After the download completes, double-click **Respondus Secure Browser (x64c).pkg**.
    *   **Chrome:** Click **Download Respondus Secure Browser (x64c).pkg**.
5.  Refer to the image below for the correct file name:

![Visual reference of the Respondus Secure Browser package file name on Mac](https://cdn.kustomerhostedcontent.com/media/67995a4f39b1628aae5f25cd/4c9ee1f67366baf2b0aa40f415e9c2ff.png)

6.  When the _Respondus LockDown Browser OEM Installer_ dialog opens, click **Continue**.

![Respondus LockDown Browser OEM Installer welcome dialog on Mac](https://cdn.kustomerhostedcontent.com/media/67995a4f39b1628aae5f25cd/6e4f80ef9132de69c1d5ec54fb8f1e10.png)

7.  Click **Continue** once more on the following screen.

![Respondus installer second Continue prompt on Mac](https://cdn.kustomerhostedcontent.com/media/67995a4f39b1628aae5f25cd/0eb25a6e431ddf19e36493a7e7ff8a22.png)

8.  If prompted, enter your **Administrator password**, then follow the remaining on-screen steps to complete the installation.

![Mac system prompt requesting Administrator password during Respondus installation](https://cdn.kustomerhostedcontent.com/media/67995a4f39b1628aae5f25cd/bba7e57f89ab676c82d960cc2f0d40cd.jpg)

For details about biometric enrollment, see [**Create a Biometric Profile**](https://kryterion.kustomer.help/en_us/create-a-biometric-profile-enroll-in-biometrics-SkVOSIks1l).

## How to Uninstall the LockDown Browser

If you need to remove the LockDown Browser from your device, visit the [**Respondus Support site**](https://support.respondus.com) for step-by-step uninstall instructions.

**Important:** Disregard any "Important note" referenced in the uninstall guide — once the LockDown Browser is removed, you will not be able to run Respondus again.