There are a few threads where this has been solved but none of the fixes are working for me so creating a new thread. KOMPLETE 11 + KOMPLETE 12 SELECT for S-SERIES Mac 10.15.3 Just bought a S61 Mk2 Komplete Kontrol and I am experiencing the issue where some NI instruments play an audio preview and some, actually most, do not. Have re-installed all instruments via Native Access and the problem is still happening. 'Previews' does not show on NI Access as either an installed / not installed product. 'Native Browser Preview Library' is not appearing in "My Products and Serials" in my NI account. A list of NI instruments working (play an audio preview) / not working (no audio preview) are below. Not Working: AR 50s Drummer AR 60s Drummer AR 70s Drummer AR 80s Drummer AR Modern Drummer AR Vintage Drummer Absynth Action Strikes Action Strings Alicia's Keys Battery Cuba Damage Drum Lab Emotive Strings Evolve Mutations Evolve Mutations 2 Evolve R2 Flesh FM8 Form George Duke ST India Kinetic Metal Kontour Maschine Drum Selection Massive Monark Polyplex Prism Razor Reaktor Blocks Retro Machines Rise & Hit Rounds Scarbee Funk Guitarist Scarbee Jay Bass Scarbee MM Bass Scarbee MM Bass Amped Scarbee Pre-Bass Scarbee Pre-Bass Amped Scarbee Rickenbacker Bass Scarbee Vintage Keys Strummed Acoustic Session Strings Pro Scanner XT Spark Studio Drummer SE Brass Ensemble SE Brass Solo SE Strings Ensemble SE Woods Ensemble SE Woods Ensemble Solo The Gentleman The Giant The Grandeur The Maverick Una Corda West Africa Working: Balinese Gamelan Blocks Base Blocks Prime Mikro Prism Session Horns Pro Vintage Organs Any help is much appreciated...Thanks!