does high sierra support aperature?

Bear in mind that although Aperture version 3.6 does run in High Sierra any new cameras that can shoot RAW images are not supported under the Camera RAW engine and will be flagged as an Unsupported File Format.

Apple officially stopped supporting Aperture in 2015, so there will be no further progress there.

Yes, Aperture runs on High Sierra, as long as it’s the most recent version.