SMC Firmware Update and the MBP (Updated)

SMC Firmware Update and the MBP (Updated)

Summary: If you're using a utility like Joel LeBoss' CoreDuoTemp v0.6 or Dr. Marcel Bresink's Hardware Monitor 3.6 to keep tabs on the CPU temperature you'll be disappointed to know that Apple's recently released SMC Firmware Update breaks these applications on the MacBook Pro.

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TOPICS: Software
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If you're using a utility like Jonathan Pepin's CoreDuoTemp v0.6 or Dr. Marcel Bresink's Hardware Monitor 3.6 to keep tabs on your CPU temperature you'll be disappointed to learn that Apple's recently released SMC Firmware Update breaks these applications on the MacBook Pro.

hardware-monitor-error.png 

Apple's suitably vague on what, exactly, the SMC Firmware Update actually does other than saying:

The SMC Firmware Update 1.0 is a System Management Control (SMC) firmware update for certain Intel-based computers, including iMac (Early 2006), Mac mini (Early 2006) and MacBook Pro (15-inch) computers.

CoreDuoTemp relies on InCrew's SpeedIt kernel extension to get its information which is apparently broken by the SMC Firmware update.

According to Information Week the new SMC Firmware update reduces the operating temperature of some user's MacBook Pros:

Although Apple said that the update was to "System Management Control (SMC)" firmware, it was up to MacBook Pro (MBP) users to figure out that SMC is the specialized controller that manages thermal and power conditions, and is in charge of running the portable's fans.

Within hours of the update, users began reporting that the update seemed to increase the MacBook Pro's use of its fans, and using diagnostic tools, claimed that their machines were running up to eight degrees cooler.

"The fans are now working like they should," wrote another user, dubbed 'interval,' after he/she had installed the update. "Although the computer is much louder when being taxed, it's much much cooler. In fact, the area above the f-keys is just warm to the touch because the fans are actually forcing the air all the way out of the machine."

I just installed the SMC Firmware an hour ago so I can't really comment on its performance yet, but any prospect of cooling my MacBook down sounds attractive to me.

What has your experience been with MBP temperature? Have you installed the SMC Firmware yet? 

UPDATE 2006-0519: I removed part of this post containing InCrew's comments as they were relating to the previous Firmware update, not the SMC Firmware.

Topic: Software

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2 comments
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  • SMC Firmware

    I upgraded when it popped up on software update. Seems that I
    have been noticing it cooler snce the update. I was working heavily
    in Photoshop, Word, Excel, and Illustrator and I was surprised to
    hear the fan when it never went on previous. Since I keep a tray
    inbetween myself and my macBook, I really can't tell how hot it
    gets. Maybe I'll try tonight!
    tatdude_keytee
  • Speedit works fine for me

    I updated the firmware right when it came out. It seems to be
    running cooler.

    The Speedit kernel extension works fine for me, both
    CoreDuoTemp and Temperature Monitor run properly.
    V-Train