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Windows Downloads
MiKTeX must be installed before TeXStudio.

You can download MiKTeX at

Click the "DOWNLOAD" button at the top of the webpage.

On the new webpage click the blue "Download" button.

Follow the instructions in the guide listed below to finish the installation.
MiKTeX will automatically install TeXworks which is a LaTeX editor.

If you would like you can use TeXStudio instead though which is a different LaTeX editor. It is up to preference.
You can download TeXStudio at

MacOS Downloads
You can download MacTeX at

Please contact us if you run into any issues with MacTeX.