If the Omnisphere Bank has an .omnisphere extenstion
1. Open Omnisphere.
2. Click on the Utility button at the top left.
3. Select Install .omnisphere
4. Locate the .omnisphere file and click “OK” on the prompt message.
5. The sounds should now be installed under your “Shared” directory.
If the Omnisphere Bank has a bunch of .prt_omn files or .omn files
1. Copy & Paste the Omnisphere Bank Folder into Steam/Omnisphere/Settings Library/Patches
2. Open Omnisphere and refresh the database
3. The sounds should now be installed under your “User Directories” directory.
Note: directory remains the same for both Mac and PC.