All of my Macs have the MenuMeters Preference pane installed, so my CPU use is always visible in the Menu bar - with this I can see that when idling they all use between 0-2% CPU.
I just noticed that my recently acquired 15" DLSD was idling at 12-15% - trying to hunt down that missing CPU task in Activity Monitor, Console and Top in Terminal revealed nothing.
I ran Onyx to clear out caches and fix permissions etc but it still remained...then I turned Airport off....back down to 0-2%!
I suddenly remembered, had I turned Configure IPv6 off in Network Preferences like I normally do?
Sure enough, it was set to the default of Automatic - switching it off returned the CPU meter to 0-2% - worth knowing if you like to squeeze out every bit of CPU.
I just noticed that my recently acquired 15" DLSD was idling at 12-15% - trying to hunt down that missing CPU task in Activity Monitor, Console and Top in Terminal revealed nothing.
I ran Onyx to clear out caches and fix permissions etc but it still remained...then I turned Airport off....back down to 0-2%!
I suddenly remembered, had I turned Configure IPv6 off in Network Preferences like I normally do?
Sure enough, it was set to the default of Automatic - switching it off returned the CPU meter to 0-2% - worth knowing if you like to squeeze out every bit of CPU.
