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Level 1

65 points

Leopard and Fans

I just installed Leopard, and it looks great! Yet, my MBP runs hot and it fluctuates every 5 minutes between 55 and 74 C for no reason. Suddenly the fans will just turn on super fast, and then shut down to normal. I cannot isolate what it is causing it. I repaired permissions (took much longer than in Tiger) and I ran activity monitor to isolate any errant apps - nothing out of the ordinary, even when the fans shoot up...

I use smcFanControl (an essential app in Tiger, if you ask me), but it still wants to run hot. Anyone have any answers or fixes?

Rich

mac book pro C2D - 15,4" - 2.33gHz - 120gHD - 3gRAM, Mac OS X (10.5)

Posted on Oct 26, 2007 11:29 AM

Best reply

Udo Weyers

Level 1

20 points

Posted on Oct 26, 2007 11:41 AM

I had the exact same problem, fans running very fast during normal operation, but after restarting the MacBook Pro it just went away - for whatever reason.

Udo

PS I don't use SMC, at least not on my MBP.

View in context

22 replies

Nov 13, 2007 3:12 AM in response to gavinfoster

I have a MacBook Pro running Leopard and it is fine.

Nov 18, 2007 1:12 PM in response to Christopher Weider

no thats not it cus my fans have been revving up sense I installed leopard

Nov 18, 2007 1:38 PM in response to Chas Briggs

Presumably all have tired PRAM and SMC resets?
http://docs.info.apple.com/article.html?artnum=303319
And since smcFanControl has not been specifically updated to be "10.5 compatible" I would be suspect and at least reinstall the latest version.

MMulhern

Level 2

217 points

Nov 24, 2007 2:23 PM in response to David DeCristoforo

Thx! PRAM and SMC reset "fixed" an excessively noisy fan on my MacBook... I never noticed the fan prior to the Leopard upgrade.

Dec 5, 2007 7:58 AM in response to rvdparis

Same problem for me. Under Tiger, my iMac was quiet. Now under Leopard, the fan makes more noise than my car does. I hope this problem will be fixed soon in 10.5.2.

Dec 14, 2007 12:18 AM in response to rvdparis

I did the suggested reset and it seemed better for a while. A couple weeks later, my PB fans are crazy again.

I'm getting really sick of this.

Dec 15, 2007 2:45 PM in response to rvdparis

I had a horrible fan noise problem on my G5. The things would just rev up out of the blue...about every 10 minutes or so. Nothing in the activity monitor out of the ordinary. So....I went into the Energy Saver prefs and changed the Processor performance from "Automatic" to "Highest". That was 3 days agaon and I haven't had the problem since. Hope this helps.

Leopard and Fans