For some instruments, such as keyboards, Finale 2012 and later automatically loads the correct patch from IO. However, since IO is a unique library that is mostly mixtures and blends rather than individual instruments, most instruments in Finale will not have a corresponding patch in IO, and vice versa. You can set up blank staves and assign the IO patch you want to use in either the Score Manager (Window > Score Manager) or by opening an instance of the ARIA Player from MIDI/Audio > VST Banks & Effects (Windows) or MIDI/Audio > Audio Units Banks & Effects (Mac).
Attention Mac Users
Apple will release macOS 15 (Sequoia) on Monday, September 16, 2024.
Finale v27 is not compatible with Sequoia and will not be updated.
For more information:
macOS 15 Sequoia and Finale Notation Products
Disabling Automatic macOS Updates