The
good news is that Mac processors keep getting faster and faster, and with the G5, we may actually have a system that can meet or surpass the performance of an Intel machine in applications other than Photoshop. This performance comes at a price, however, namely heat. Fortunately, nearly all recent Macs have some method of measuring the processor temperature. Some have a dedicated temperature sensor, while others use a sensing feature of the PowerPC processor itself. If your Mac has a way of measuring temperature, then Temperature Monitor can report it
Check It Out: Want To Keep Your Mac Cool? Temperature Monitor Can Help!