Before uninstalling, please verify your data is synced by signing in at


  1. Quit Day One Mac.
  2. Go to this location on your Mac: /Users/[USERNAME]/Library/Group Containers/5U8NS4GX82.dayoneapp2/ (see screen shots below)
  3. Drag the entire folder 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 from the Applications folder 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. Sign in to Day One Sync. Your data will download again.


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