Blog by an Apple Certified Tech

Office for Mac files not showing in Spotlight

This problem might happen with any MS Office file.

Some of the Mac users noticed that many of my Excel documents were not indexed as part of the Spotlight database; Spotlight search results for obviously-known content was coming up empty.
mso The reason for this invisibility was that I still had Microsoft Office 2004 installed (some of the users keep this for macro compatibility), and when this happens, the old PowerPC version of Microsoft Office.mdimporter still sits in your ~/Library/Spotlight folder.
Many mdworker console messages were indicating that only a PowerPC importer plug-in was found, thus many Office documents weren't getting indexed.
The solution to this is to trash the PowerPC version of this file, and trash the /.Spotlight-V100 file, which forced a total re-indexing. The system then used the Intel version of the Spotlight importer, and all my Office documents are once again indexed.