Are you getting too many hits in your Mac OS X Spotlight searches? You can easily exclude one or more types of files using the NOT operator to filter out the undesired file types. Here’s how.
Let’s say you want to look for the words “seo tips” — but not in Word documents. Here’s what you’d search for:
“seo tips” NOT .doc NOT .docx
This example searches for the exact words “seo tips” by using double-quotes, and then excludes any document that is identified with either .doc or .docx, the most common MS Word file name extensions.