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?
MacOS – Preview app not working properly in macOS Mojave
macosmojavepreview
Related Solutions
Use Spotlight.
Spotlight is a system-wide desktop search feature of Apple's macOS and iOS operating systems. Spotlight is a selection-based search system, which creates an index of all items and files on the system. It is designed to allow the user to quickly locate a wide variety of items on the computer, including documents, pictures, music, applications, and System Preferences. In addition, specific words in documents and in web pages in a web browser's history or bookmarks can be searched. It also allows the user to narrow down searches with creation dates, modification dates, sizes, types and other attributes.
With Spotlight you can do advanced searches and filter for example on file extensions like .pdf.
Preview does remember the position of windows containing images (JPG, PNG, etc) but for some reason does not restore the position of PDF windows. I suspect this is a bug.
The saved state for Preview is located at: ~/Library/Containers/com.apple.Preview/Data/Library/Saved Application State/com.apple.Preview.savedState
Meanwhile, you can use an app like Stay to remember and automatically reset the position of any window. It’s a bit heavy handed for this use case but it would let you carry on until the bug is fixed.
You might also look at window managers such as Tiles or Rectangle that allow easy manipulation of windows.
Best Answer
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: