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After upgrading macOS to Mojave, Preview app is not functioning the same. I am no longer able to delete, drag & drop or select several files and open in the same window.

Is there a fix for this or do I need to go back to Sierra?

  • Firstly, welcome to Ask Different! :) I hope you come to find this site has a lot to offer! In case you haven't already, it's worth taking the time to read the tour. In the meantime, I haven't noticed any problems with Preview app in macOS Mojave (at least not with using drag & drop or opening several files in the same window). In terms of no longer being able to delete, can you clarify exactly what you're trying to do with the Delete option? – Monomeeth Jan 24 at 0:10
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I would make a brand new user account on this Mac and be sure it's reproducible. I would hate for you to have user permissions corruption and have this be fixed with a new user.

Also - be sure to try a couple PDF you get from printing a web page to a PDF or other "clean" PDF that come from pages or word and print to PDF as opposed to export to PDF.

Sometimes a class of older or crafted / complicated PDF can cause issues that take a couple months for Apple to fix. I have a couple Mojave PDF related bugs that still aren't fixed since they are rare/obsucure/took a while to convince Apple they were legit.

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Ensure in Preview's preferences, that either Open all files in one window or Open groups of files in the same window is selected. If that looks OK and you're still experiencing the issue:

  1. Quit Preview
  2. Move ~/Library/Preferences/com.apple.Preview.plist to the Trash
  3. Re-launch Preview
  4. Re-check preferences & ensure Open all files in one window or Open groups of files in the same window is selected
  5. Attempt to reproduce your original issue
  • Well I tried that, but no change in response. I have looked for duplicate files and there were none. Do you have any other approaches to this ? I appreciate your input – user318489 Jan 24 at 23:20
  • I'm only able to replicate your issue by deliberately setting "Open each file in its own window" in Preview's preferences, even after creating a new test account on my Mac running 10.14.3. Can you try logging in as another user (use the Guest account or create and use a temporary account if needed) to see if the issue persists? Also, have you upgraded to the latest version of Mojave (10.14.3)? – Craig Stodolenak Jan 25 at 1:47
  • I will try that and let you know how it goes. Yes I recently updated to 1.4.3 . I have also used the quick action drop down to build a pdf of selected files. It will open in one window, but it won't allow any deletions. Its grayed out. Bizarre.... – user318489 Jan 25 at 18:25
  • I have a raw guest desk top that I logged into. I was able to do normal functions on that side. Now I am wondering what could be causing the issue on the normal login. Thanks for your input – user318489 Jan 27 at 16:01
  • Reboot. At the login window, enter the credentials for your primar login, but hold down the shift key while clicking on the "Log In" button. Release shift when you se the Dock appear. This will temporarily disable any login items from launching (like a Safe Mode but just for your account). Re-test. If resolved, go through your Login Items (System Preferences > Users & Groups > Login Items) and start playing whack-a-mole with them until you discover what's causing the issue. – Craig Stodolenak Jan 28 at 0:22

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