Temperature logger compatible with Mac? I'd like to measure the temperature in my fridge over a few days and graph the results, since I think the fridge may be starting to fail.

So I'm looking for a cheap device which can run independently on battery power, which logs the temperature and timestamp every few seconds to a file.  I want to plug this in to my Mac and retrieve the data.  I don't particularly need software to generate the graph: I can do this with Numbers, Excel etc.

This "RC-4" unit pictured below is the sort of thing I'm imagining.  However, it doesn't seem to be Mac compatible.



Can anyone recommend a suitable product?

Alternatively, I could set up a Windows installation for this device in VirtualBox, but I wonder if that would handle the USB drivers correctly.  Can anyone offer any experience here?
The Go!Temp from Vernier works a charm for me! 50 USD with free software download.