I have purchased a Mathematica Student license. To download it there are the steps
- Download the download manager.
- Install it.
- Run it to get it to download the actual Mathematica installer .dmg file.
- Run the installer to install Mathematica.
When I tried to carry out the following steps there was no response whatsoever after step 3. It was as if I never had any thoing todo with mathematica in the first place.the download manager. It just said that failed to open some file "M-OSX-L-12.0.0-6206964.dmg". There were two buttons "Browse" and "Launch". On succesive tries trying anyone of them was useless. Nothing would happen. I have read the following links 1, 2