A few months ago I bought the new Macbook Pro Retina 15" with a 2.7GHz I7 cpu.
So far it's been working fine, but as soon as just 1 of the cpu cores is at 100% the thing heats up like crazy. Heating the keyboard area up to the point of being uncomfortable to type on. Is it normal for Macbooks to heat up to the point of being painful to type?
My previous laptop (IBM Thinkpad) would only get this hot when running at 100% cpu + 100% gpu load in the burning sun… otherwise it wouldn't get close to being this hot (and noisy…).
The temperature indicates about 65 degrees Celcius right now with slightly more than 1 core filled up (i.e. 15% cpu load).
Best Answer
From what I've seen so far from others with the same laptop is that it's normal.
One possible fix/improvement to this is the latest Apple SMC update which contains some fixes for this: http://support.apple.com/kb/DL1559
It also reduces the amount of noise your fans start making with even a little bit of load so it is quite useful.