Adam Monroe's Honky Tonk Piano Compatibility/Version List as of 12-6-2022 Current Versions: VST2 Windows 7/8/10 (x86, x64) macOS Legacy (10.9-10.13 - x64) macOS Mojave (10.14 - Notarized x64) macOS Catalina (10.15 - Notarized x64) macOS BigSur (11.0 - Notarized, Universal x64/ARM64 w/M1 Support) macOS Monterey (12.0 - Notarized, Universal x64/Arm64 w/M1 Support) VST3 Windows 7/8/10 (x64) AU (Audio Unit) Windows 7/8/10 (x86, x64) macOS Legacy (10.9-10.13 - x64) macOS Mojave (10.14 - Notarized x64) macOS Catalina (10.15 - Notarized x64) macOS BigSur (11.0 - Notarized, Universal x64/ARM64 w/M1 Support) macOS Monterey (12.0 - Notarized, Universal x64/Arm64 w/M1 Support) AAX (Protools) Windows 7/8/10 (x64) macOS Legacy (10.9-10.15 - x64) macOS BigSur (11.0 - Notarized, Universal x64/ARM64 w/M1 Support) Planned Versions: macOS VST3 Big Sur, Monterey, Ventura (Notarized, Universal x64/ARM64 w/M1 Support) macOS AU Ventura (Notarized, Universal x64/ARM64 w/M1 Support) macOS VST2 Ventura (Notarized, Universal x64/ARM64 w/M1 Support) Plugin has not been tested on Windows 11 but is presumed to work fine as Microsoft never depreciates their system code!