When Apple stopped development of Aperture three years ago, it was understandable that Topaz stopped supporting Aperture. Apple’s “replacement”, Photos, was more of a toy app then.
In the latest versions n of Apple’s system, High Sierra, Photos gets major enhancements. More and more apps now plug in to Photos. For example, combined with the RAW Power app, serious editing can be done.
It’s time for Topaz to look again at supporting Photos, especially in view of its promises of “free upgrades for life” (I am still using Aperture) and “unlimited support”.