If your instrument is not appearing in your DAW/host after you've completed installation, here are a few things to check:
Restart your Mac to reload the AU components for your instruments. Additionally, this forces you to restart your DAW/host application, which is also helpful.
On Windows, an instrument's dll file (VST) can be saved to a location of your choice. Your DAW/host uses that file to load the instrument.
The most common cause of an instrument not appearing in your DAW/host on Windows is a disconnected DLL file path, meaning the dll file was saved to a location that the DAW is not scanning or seeing.
To solve this, confirm which file path(s) your DAW/host is using to scan for plugins. These file paths are often found in the plugin manager of your DAW/host.
The default file paths for Spectrasonics instruments' DLL files are:
64bit VST2 location - C: Program Files/ Steinberg/ Vstplugins
64bit VST3 location - C:/ Program Files/ Common Files/ VST3
32bit VST2 locations (for older/ legacy versions only) - C: Program Files(x86)/ Steinberg Vstplugins
It is also important to update the dll files that you DAW/host is using when installing software updates for your Spectrasonics instruments.
For these reasons, it is best to use the default file path for all installations and software updates.
As a catch-all solution, you can always download the last software update for your instrument and choose the file path seen in your DAW/host's plugin manager during the installation of the DLL file.
Note: The latest versions of Omnisphere 2, Keyscape, Trilian, and Stylus RMX ar 64bit only. If you must use a 32bit DAW, please contact firstname.lastname@example.org for additional help.