Advice and answers from the Day One Team


  1. Quit Day One Mac.
  2. Go to this location on your Mac: /Users/[USERNAME]/Library/Group Containers/5U8NS4GX82.dayoneapp2/
  3. Drag the Data file to your Mac Desktop. (This contains a local copy of your journal data backups and might be useful if any problems arise when you reinstall and reimport your data into Day One Mac 2.0.)
  4. Drag the Day One Mac 2.0 app to the Trash Can.
  5. Be sure to quit Day One Helper in the menu bar if necessary.


  1. Go to the Mac App Store > Purchased and click Install.
  2. Import your data. If you've previously synced, enabling sync might be your best option. (See:
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