Take your Mac's temperature with Temperature Monitor

Yeah Apple's firmware update (which I think came pre-installed on my MacBook) turns off the ability to sense temps. I guess we're supposed to think that ignorance is bliss...

But my MacBook doesn't get too hot at all. If the CPU is being taxed, it gets warm and the fan runs so quiet that you have to hold your ear right to it to even know. If the CPU and graphics chip are both being taxed, then the fan spins up to an audible level. But that's what the fan is there for, and it works like it should. It's just a dick move to remove that functionality, but the Windows side can still use the sensors.

It couldn't find my macbook's sensors...

i like istat widget, lets me know everything i need to know

I use the Lite version included in the DL which keeps my G4's temperature handy up in the menu bar. Great app - the history window is really useful sometimes too.

I've used it forever. The ability to put it in the corner, floating above the desktop is awesome. The widgets can't do that.

There are widgets that do as good of a job as temp. monitor and are actually convenient.

Timely? I've been using this thing for at least 3 years. It works, but I find that I'm less neurotic if I don't know what the temperature is. I figure the machine will shut itself down if it gets too hot, so I stopped worrying about it.