When creating lens flare presets such as these, there is always a phase of experimentation and research involved. You need to learn the features of the particular plug-in and find ways how to avoid or work around limitations just as you collect ideas for flares that might look cool. Some of that stuff never makes it into the final release, but nonetheless some people might find it useful if only to learn some tricks or derive their own inspiration. The below is such a collection. These flares require the Sapphire v6 plug-ins or the corresponding Edge plug-ins. Because they are provided in the specific GenArts preset format and not as After Effects projects they can also be used in Nuke, Final Cut Pro, Vegas or tools supporting OFX. For that, they need to be placed in the proper directories which e.g. on Windows is
C:\ProgramData\GenArts\Presets
They will then be accessible through the preset browser or flare editor, respectively.
How would I install them on a Mac?
No idea. You will have to inquire with GenArts for the exact details. I’m sure though, there is something like a
Library:Application Support:GenArts
folder somewhere.