Here are a few tips on things you can do to speed up Sibelius 4 on Intel based macs:
• Go to the File > Preferences menu and click on Display in the top left hand corner. Then in the Smoothing options change the setting from Smoothest to Smooth and Fast.
• Go to the File > Preferences menu and click on Textures on the left hand side. Then change all the Paper and Desk textures to Use color not texture.
• Reduce the demand that the DLS Music Device places on the processor. In the Play > Playback and Input Devices dialog select Quality and set the Sample Rate to 22050Khz.
• Add more RAM to the Mac - the more ram a computer has the faster it will run as it will be more able to cope with multiple applications. e.g. Most Intel Macs currently ship with only 512MB RAM as 2 x 256MB chips and either or both can easily be changed to give the computer up to 2GB RAM.
• Check that you are using the latest drivers for your midi and audio devices - many devices now have Intel Mac drivers available - see the manufacturers website for more details e.g. M-Audio Drivers for M-Audio devices.

For information on getting the best out of the Sibelius Kontakt Player, check out our SweetCare article "Kontakt Player - optimal settings to improve playback inn Sibelius." (Knowledgebase article #30766)