On macOS, the plugins will automatically install into the system VST, Audio Units and AAX folders.Unzip the installer and run the Installer file for your plugin.DO NOT try to open the extracted keyfile with any application, DO NOT double-click it expecting it to find an appropriate application with which to open it. Once this is downloaded to your computer, double-click the. You need to SAVE this file to your computer when you click the keyfile link to download it, your browser will save the. Also in your User Account is the License keyfile (see the above image) this is used to authorize the plugin within your DAW.Should you ever need to download it again, the installer files are in your User Account on the Valhalla site: When you purchase a Valhalla plugin, the email you receive after the purchase includes a link to download the installer.