Step-by-step instructions for installing Audubon Audio plugins on Windows and macOS.
Our macOS builds are fully signed and notarized by Apple — install them like any other app. Our Windows builds are not yet Microsoft code-signed, which we are working toward.
What that means for you:
.pkg, double-click, and follow the installer. Gatekeeper recognises the signature, so there is nothing to unblock..zip file and select Extract All. Inside you will find a .vst3 folder.

C:\Program Files\Common Files\VST3\
.vst3 folder from your extracted zip directly into C:\Program Files\Common Files\VST3\. Windows may ask for administrator permission — click Continue to confirm.
.pkg installer file — there is nothing to unzip and nothing to drag anywhere.

.pkg and follow the installer. macOS will ask for your login password to authorize the install — that is the standard prompt for any installer that writes to a system folder. The plugin is placed in /Library/Audio/Plug-Ins/VST3/ for you.
