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Disabling dual core within mac os x


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I recently installed iatkos7 on my dell d620. everything works great, but i was wondering if anyone could tell me how to make mac os x only use one my cores. i hate to have to toggle between dual and single core mode in bios when i go between windows 7 and mac. i have a core duo 1.83 T2700 cpu. I want to have it set to dual core mode all the time. I have plans to swap this cpu out but for the time being can someone shed some light on this please? i tried a method where i go into terminal and add the cpus=1 string, but i can't find how to commit the change. please someone help me! btw this is my first post so if this is in the wrong place i do apologize


I followed this, but can't find how to save the changes.

CODE sudo nano



Find where it says:

<key>Kernel Flags</key>


and change that to:

<key>Kernel Flags</key>



And there, were done. Now go into your bios and select dual core mode and leave it there. Boot into OSX it will only use single core, any other OS has all cores open to them

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