Phantasmic

Phantasmic is system menubar application that monitors the temperature sensors of your Macintosh computer and optionally allows you to control the system fan(s). There is no icon in the Dock, but instead a menu is added to the system menubar displaying a temperature and fan speed. If you click on this menu you will see a number of commands allowing you to view more detailed information. On first run you will be prompted for your system administrator credentials. Phantasmic requires a small privileged helper program to make adjustments to the hardware settings. By default, Phantasmic operates in a monitor mode and makes no adjustments to your system fans, simply reporting the readings from the various sensors built into your Macintosh hardware. Fan adjustment is enabled by checking the 'Modify Fan' checkbox. When controlling the fans you can choose either set the fan to constant speed, or alternatively allow variable speed, tracking a selected temperature sensor between an upper and lower value.