Halion doesn't show up in Logic Pro X

Hi all,

I’m new the Halion libraries and figured I would give them a try - however - neither halion 6 OR halion sonic se show up in LPX under the Steinberg tab under “AU Instruments,” the only one that shows up is the Halion Symphonic Orchestra library that was included with Dorico. Am I missing something in order to integrate the halion vst / au’s into LPX?

Thanks in advance!