Mac OS X Spotlight search is a powerful beast, returning all types of search results in seconds. However, if you don’t use it to launch apps, or find files then it can take up precious CPU cycles for no good reason.

As with all features such as this, if you don’t use it or use alternatives such as QuickSilver then switch it off. Doing so will prevent Spotlight index service from indexing the drives on your machine, thus meaning it will return no results when used. To switch off the indexing open a Terminal window and type:

sudo mdutil -a -i off

sudo mdutil -a -i on