If you are experiencing issues downloading the Mac download for Respondus, please use this link to download the .zip file to your computer.
We recommend that after you install the file, you also verify it is available in your list of installed programs.
On any test requiring Respondus, there is an option to "Open LockDown Browser Confirmation Page". We highly recommend using that link prior to attempting any test that requires Respondus, even if you have ran it successfully before.