what does this error mean?

[DaReaper]

This keeps poping up after using the computer for a long period of time.

 

[Comeagain?]

Command + Shift + 3! (screenshot shortcut)

 

[Peace]

It means istat pro needs to update their program.

That is istat right ?

 

[mrsir2009]

Is that warning coming from the Finder or from an application? If so, what application?

 

[lgtw]

It's coming from the Temperature Monitor app, you probably have a bad temperature sensor somewhere, that or you just need to reset the SMC, which just resets components inside your computer.

 

[DaReaper]

It's coming from the Temperature Monitor app, you probably have a bad temperature sensor somewhere, that or you just need to reset the SMC, which just resets components inside your computer.

How do I reset it? It's causing my computer tofreeze. 24' imac early 2009

 

[stridemat]

Reset SMC.

 

[Nameci]

How do I reset it? It's causing my computer tofreeze. 24' imac early 2009

Google is always your friend. It is covered on most apple support documents.