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which energy saving settings should i choose for my Tiger?

296 Views 3 Replies Latest reply: Mar 14, 2013 8:16 AM by OGELTHORPE RSS
Brenda.S Calculating status...
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Mar 14, 2013 4:02 AM

Although i have had my computer for many years I am very much a 'silver surfer' and I seem to have messed up the energy saver. The only thing i altered was to put my computer to start up an hour earlier but the screen stays dark and the fans roar! However, after turning off/on the main power switch at the wall, normal service resumes. Please can someone advise- I admit to feeling a bit scared!

  • OGELTHORPE Level 7 Level 7 (22,585 points)

    You may have experienced a 'runaway application.  This support article will give some insight on this:




  • OGELTHORPE Level 7 Level 7 (22,585 points)

    There are three sets of conditions that will set the fans at top speed, or roaring'.


    1. A temperature sensor has failed and the Mac will by default engage the fans in order to protect it self from possible over heating.  This can only be stopped by fixing the hardware problem.


    2.  One is using a heavy duty application (Skype, games, video, etc.) that require a lot of CPU resources and thus creates heat and consequently speeds up the fans.


    3.  A 'runaway process' where an application gets into a loop and thus loads up the CPU requiring the fans to speed up in order to dissipate the heat.


    None of these conditions have any direct connection to energy savings.  That is not your problem.  Consider downloading iStat pro from the Internet.  This widget monitors the internal temperatures and fan speeds of you Mac.  If your fans start to speed up again, open Activity Monitor (set to 'All Processes and '%CPU' to show values from high to low) and you should be able to determine what applications are the problem.  Shut down the ones you can or do a restart.




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