This installs Anvil into the standard plug-in locations:
VST3 → /Library/Audio/Plug-Ins/VST3/
Audio Unit → /Library/Audio/Plug-Ins/Components/
Standalone → /Applications/
After installing, rescan plug-ins in your DAW. To unlock, open Anvil, click
UNLOCK in the header and paste the free key from your email
(get one at veloraaudio.com).