Software solution to noise problems e.g. caused by iMac HDD replacement or overheating problems e.g. on Macbook Pro. Change fan speed to any constant value or control fan speed in relation to temperature sensor (3-rd party HDD on iMac). Real-time monitoring of mac's fans speed and temperature sensors including 3rd party HDD/SSD (using S.M.A.R.T.) with display of tray icon (menu bar icon on Mac OS). Works on both Windows XP/7/8 (in Boot Camp) and Mac OS Mac OS X 10.6 and higher.