Only files that were deleted by the Finder will have a specific 'Put Back' option once in the Trash. One thing to note - any files you need to put back must be put back manually with this method. You can rinse & repeat this until you're sure you threw out just the correct files if it doesn't go smoothly first time. Once done, drag WhatsApp back out of the bin into Applications & try again. You can also show the locations of all files, so you can make copies in case anything goes wrong. It will find & delete all history if you let it, but you can uncheck files you need to keep. Be careful you don't discard anything you might need to keep. Launch it, drop your WhatsApp app onto it & see what it finds. One I've used many times over the years is AppCleaner (Freeware). If that doesn't work, then there are many app removers on the web which will do a more complete job. Share Improve this answer Follow answered at 6:04 Rupak Nepali 111 2 Add a comment 0 Deleting an app & re-installing usually changes nothing. Clicked command + space, typed 'App Store', found WhatsApp, and clicked update. The first one to try is in ~/Library/Saved Application State/ The saved state for each app is then in a folder called / Once you find the folder just delete it & try launch again. 1 Faced the same black screen, it was fixed by updating the WhatsApp application. If the app itself will not work on any particular OS, then the developers will have to fix it however, if it's simply a setting in your own machine, then you need to find & clear all the settings files. Deleting an app & re-installing usually changes nothing.

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