Initial results of this firmware update are very positive. The mooing issue is now gone for good and the temperature drop is astounding. Some users are reporting as much as a 20C drop in temperature.
The fixes don't come for free, however. The MacBook's fans will now run at a very low speed all of the time. I personally don't notice it at all, and only hear the fans when my ears are directly up against the fan vent. For a 20C drop in temperature, a small increase in sound is worth it.
If you're looking to download MacBook SMC Firmware Update 1.0, you can get it on Apple's website or download it from Software Update.
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