The Preview app in El Capitan has serious memory leak problem.
Posting this new question, since the same question from 2015 is now locked.
Three years and still the problem persists........
APPLE PLEASE FIX IT!
MacBook Pro with Retina display, OS X El Capitan (10.11.6)
This is a user-to-user technical support forum. It is NOT a channel to Apple developers.
You can file a bug if you like, or just send feedback
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<http://bugreporter.apple.com>
Anyone can get a free ADC account at:
<https://developer.apple.com/register/index.action>
macOS Feedback
<https://www.apple.com/feedback/macos.html>
They will not reply, but it does get read.
Do a backup, preferable 2 backups on 2 separate drives.
Quit Preview.
Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Remove the following. You may not find them all. Restart and test.
Containers/com.apple.Preview
Containers/com.apple.quicklook.ui.helper
Preferences/com.apple.Preview.LSSharedFileList.plist
Preferences/com.apple.Preview.SandboxedPersistentURLs.LSSharedFileList.plist
Saved Application State/com.apple.Preview.savedState
Credit Linc Davis for this solution.
Preview Reset automatic download - 3rd party solution
Preview App memory leak
