Hi guys, my MacBook Pro seemed to go hay wire! I recently decided to try and max out the CPU (2.53Ghz) and see the resulting temperature. After reading a bit in forums, many people said that there maximum temperature achieved was 85 degrees celsius. I downloaded CPUtest and ran it. I slowly saw the temperature on SMCFanControl climbing from 47 degrees celsius up to 55, then 60, then 70, then 80, then 90..... hey what the hell, fans are still only running at 2000rpm, 95, 99, 100, 102... 105... 108! The fans are still at 2000rpm! These values are in celsius, yes CELCIUS! I stopped CPUtest and shutdown the MBP and reset the SMC. Done the test again same results. Resetted the PRAM. Same Results! I don't know what's happening! I ran two instances of /dev/null and again the temperature rose to 105-108 degrees celsius, with the fans staying at 2000rpm! Should I return my MBP? I know the answer would by yes but can someone tell me what is happening? Am I getting false readings? UPDATE: This seems to be a widespread issue, follow these steps to see if your MBP suffer from this issue: 1) Reset the SMC (http://support.apple.com/kb/HT1411) 2) Install a temperature monitor software (iStat Pro Widget, iStat Menu, SMCFanControl, but not Fan Control) 3) a) Download CPUTest, and run the test with these settings: - Test Type - small - Repetitions - Unlimited - Instances - 2 OR b) i) Open Terminal (Applications -> Utilities) ii) Type without quotes: "yes > /dev/null" iii) Open another terminal window iv) Retype "yes > /dev/null" (This should load your CPU to 100%) 4) Observe the temperatures and fan speeds. (Typically, after an SMC reset, the fans start speeding up at about 70 degrees celcius, and stabilising the temperature at about 83-85) 5) Now, close CPUTest or Terminal (depends on what you used), sleep, restart, shutdown, logoff or change your GPU, and after your system is on, rerun the same test you did before. Post your results.