If you are taking an online course that requires the use of the Respondus LockDown Browser, this article will help you install the browser on your device. Downloading Respondus LockDown Browser If you are on a Windows machine, click here to download the Windows version of the LockDown Browser. If you are on a Mac machine, click here to download the Mac version of the LockDown Browser. Installing Respondus LockDown Browser Double-click on the downloaded file to begin installing the LockDown Browser. Follow the instructions on your screen to install the LockDown Browser on your machine.