Hi atom
Copy "S7S-SE6_SoundSet_7.1a.xml" and/or "S7S-SE6_SoundSet_7.1a_Lite.xml" into this folder on that machine:
/Users/yourusername/Library/Application Support/Avid/Sibelius 7/Sounds
See Installing A Sound Set for more information.
Copy "S7S-SE6_SoundSet_7.1a.xml" and/or "S7S-SE6_SoundSet_7.1a_Lite.xml" into this folder on that machine:
/Users/yourusername/Library/Application Support/Avid/Sibelius 7/Sounds
See Installing A Sound Set for more information.