How can I use purchased tones in my Mac?

Hi,

I had purchased some ringtones and alert tones which I would like to use as notifications in Facetime/iPhone calls and iMessages but in the Mac.

Im using macOS High Sierra 10.13.4 (17E199). And the hardware is Retina, 13-inch, Early 2015.

Is it possible or will it be possible someday?

Thanks.