Yes, Catalina is a supported operating system for most Toontrack products. Installers for Beatstation and EZmix 1 are not supported on Catalina.
The latest available installers for EZdrummer, EZdrummer 2, EZX add-ons, Superior Drummer 2.0, Superior Drummer 3, SDX add-ons, Drum MIDI add-ons, EZkeys, EZkeys MIDI, EZmix 2, EZmix 2 add-on packs, Toontrack Solo, and EZplayer Pro can all be used on Catalina.
On Catalina, you will need to use the Product Manager to complete the download and installation for your products. The Product Manager can be downloaded at this link: