BreadCrumbs: Mac OS X Preview

Mac OS X Preview

From Luke Jackson

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QuickLook thumbnails.data, Flushing thumbnails, Clear recent Exposé thumbnails in Preview, Preview recent files

The file is located under: 

/private/var/folders/<random>/<random>/C/com.apple.QuickLook.thumbnailcache

For example on my mac book pro: 

ljackson@Lukes-MBP 10:51:54 /private/var/folders> sudo find . | grep QuickLook
./zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache
./zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache/exclusive
./zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache/index.sqlite
./zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache/index.sqlite-shm
./zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache/index.sqlite-wal
./zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache/thumbnails.data
./zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache/thumbnails.fraghandler

ljackson@Lukes-MBP 10:52:16 /private/var/folders> sudo su -
Lukes-MBP:~ root# cd zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache
-sh: cd: zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache: No such file or directory
Lukes-MBP:~ root# cd /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/C/com.apple.QuickLook.thumbnailcache
Lukes-MBP:com.apple.QuickLook.thumbnailcache root# ll
total 184
-rw-------  1 root  wheel     0B Mar  2  2016 exclusive
-rw-r--r--  1 root  wheel    56K Nov 13  2016 index.sqlite
-rw-r--r--  1 root  wheel    32K Nov 13  2016 index.sqlite-shm
-rw-r--r--  1 root  wheel     0B Nov 13  2016 index.sqlite-wal
-rw-------  1 root  wheel     0B Nov 13  2016 thumbnails.data
-rw-r--r--  1 root  wheel   350B Mar  2  2016 thumbnails.fraghandler
Lukes-MBP:com.apple.QuickLook.thumbnailcache root#
  1. Clear all recent files in Preview
  2. Close Preview Application
  3. Execute commands below in Terminal (relative to your randomized location, see above for grep to find your location) 
mv com.apple.QuickLook.thumbnailcache com.apple.QuickLook.thumbnailcache-DEL
killall Finder
killall Dock
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