The other directories should contain third-party plug-ins supplied by developers to support their applications. Apple's included plug-ins are the following:. If your document type is not supported by any available plug-in, then you will need to install a plug-in that will read the document. In most cases you can contact the developer for a specific application to see if a plug-in is available for its documents, but if not then you can try finding one yourself at several Quick Look plug-in resource sites, including Quick Look Plugins , QLPlugins.
If you do have a Quick Look plug-in that should be able to read your document type and you still can't create a preview of the document, or if the preview appears garbled, then it is likely that the plug-in is not loaded correctly or the Quick Look server cache is corrupted and needs to be rebuilt.
First try running a permissions fix on the boot drive using Disk Utility to ensure that the Quick Look plug-ins and other files the Quick Look server needs are properly accessible, and then force Quick Look to reload the plug-ins and its cache by running the following commands in the Terminal:. Have a fix? Post them below or e-mail us!
How to Empty Quick Look Cache from MacOS
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These preview thumbnails are only about 1. Granted, it's bigger than the actual file icon, but not as big as it used to go when hitting the spacebar nearly the height of the full screen. I've attached an image showing Now and Before. The top image is only a cropped screen grab of less than a quarter of my screen. The bottom image is the full screen off my older Mac where this preview option still works.
How to Clear Quick Look Cache in Mac OS
Notice, too, that even the thumbnail of the image, in the Finder window, is constricted and has that white border now. Posted on Feb 1, 6: Feb 1, 6: The feature is called Quick Look. Try reseting the Quick Look caches by opening Terminal and typing "qlmanage -r" and then "qlmanage -r cache".
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It should be working, it does for me. It is only supposed to show the thumbnail or a plain white box if there is a problem or the file type is not handled by Quick look. Developers can create their own custom file formats and have Quick Look support them if they add a Quick Look plugin. Feb 1, 7: The tilde means start from your home folder. Thanks for that Trick James. I found the caches and put them in the trash. I restarted. It took a while, so there may have also been an update install waiting as well.
That did the job — large previews working again, and the larger thumbs in the Finder window, as well. Aug 8, Thanks James, this sorted out the problem for me. I could previously quick look video clips to decide what I want to use quickly. Then a few days ago the function stopped, what you suggested sorted the problem out as I was having to open every clip in VLC.
It made things take so long, so now I am back to normal!!