I got an email from a customer yesterday telling me that Default Folder X had stopped displaying preview images of his new-format Microsoft Office documents. It still worked for the older formats like doc, xls and ppt files, but not docx, xlsx and pptx. Because Default Folder X uses QuickLook to generate the big previews it shows below file dialogs, we did a little poking around on his Mac to figure out what was going wrong with QuickLook.
It turns out that a new beta of DropBox (version 54.3.86) installs its own QuickLook generator plugin that overrides the system-supplied plugin for generating a number of file and image formats – including those MS Office files. OK, fine – just delete it, right? That worked until he restarted his Mac, then DropBox launched at login and promptly (and silently) reinstalled its QuickLook plugin again. I guess it knows what’s best for us, eh?
After a little thought, we arrived at this solution:
- Delete the DropBox QuickLook generator plugin
- Create an empty file at that location to prevent DropBox from reinstalling it
Fortunately, QuickLook is smart enough to realize that an empty file isn’t going to help it generate previews, and just defaults back to the other plugins it has. Problem solved!
The easiest way to do this is to open Terminal and execute these three commands:
rm -r ~/Library/QuickLook/DropboxQL.qlgenerator touch ~/Library/QuickLook/DropboxQL.qlgenerator qlmanage -r
A nice simple solution once you get it figured out. I imagine this is one of those problems that’s going to crop up for a lot of people, but isn’t quite obnoxious enough to get them to hunt down a solution. So there you go 🙂