Spotlight indexing and .mdimporter files
I did a clean install of MacOS 10.9.1 on a MacBook Pro (15-inch, Early 2011), 2 GHz Intel Core i7, 4GB RAM. A day after restoring old user files and apps (using Migration Assistant) I was testing the Spotlight indexing and noticed that a large number of files in the Documents folder were not getting indexed. I then noticed that Spotlight was only about 1/20th finished indexing the drive and indicated "6 days" to complete the indexing. I did several rounds of stopping the indexing, deleting the index, and restarting the index and the situation never changed.
I then came across this article:
https://medium.com/computer-says-no/6f22422bbd59
which suggested that bad? files in the /Library/Spotlight folder might be the cause. Here is what was in that folder:
Finale.mdimporter
GBSpotlightImporter.mdimporter
iBooksAuthor.mdimporter
iMovie.mdimporter
iWeb.mdimporter
iWork.mdimporter
LogicPro.mdimporter
Microsoft Office.mdimporter
I deleted all of the above files, rebooted and then restarted the Spotlight indexing. This dramatically changed the speed at which the new index was created - it did so in under two hours. However, I am now concerned that Spotlight may fail to index documents created by Finale, iWork, Microsoft Office, etc. or that it may impede Time Machine's ability to do a proper backup of the drive (since TM uses the Spotlight index).
Does anyone know if my concerns are valid?
Does anyone know how these .mdimporter files work?
If I restore one of the .mdimporter files back to its original folder, and restart, will Spotlight now include those files in its indexing?