Оптимизация Mac OS X для аудио:
http://support.tcelectronic.com/entries/22065933-Mac-OS-X-General-audio-performance-optimization
http://avid.force.com/pkb/articles/en_US/Troubleshooting/Optimize-10-8?retURL=%2Fpkb%2Farticles%2Ftroubleshooting%2FOptimize-10-8&popup=true
http://kleine-gelezo.blogspot.ru/2011/05/mac-os-x-snow-leopard.html