Instructions below are Zoom-specific; installing Ring Central or Blue Jeans proceeds similarly.
If the installer doesn’t start up automatically, find “Zoom.pkg” or “zoomusInstaller.pkg" and double-click it
You should be presented with a dialog box like this - click on Continue
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You’ll be presented with the 2nd dialog box - click on Change Install Location
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You’ll be presented with the 3rd dialog box - click on Install for me only then Continue
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Now that you have specified where to to install Zoom, push the Install button
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The install should run to completion and Zoom should be ready for you to use. Push the Done button