mac pro 09 problem..
hello, have bought used mac pro replace g5 have problem.. it's 2009 model 2.66 quad. when connect audio interface ( apogee duet firewire ) there high pitch noise coming tower.. annoying ears.. looked around , found mac pro audio update 1.1 snow leopard.. there can ? or doomed this.. miss old g5.. hello, os running? have checked here? http://www.apogeedigital.com/support/duet-firewire loa Forums Macs Desktops Mac Pro iPhone Mac OS & System Software iPad Apple Watch Notebooks iTunes Apple ID iCloud Desktop Computers Apple Music Professional Applications iPod iWork Apple TV iLife Wireless