Outline for Mac Cannot Start


If Outline for Mac is not launching or behaving unexpectedly, resetting the app’s cache may help resolve the issue. This guide provides step-by-step instructions for both Mac App Store and direct download users to reset Outline and restore their notebooks.


🔹 Step 1: Close Outline

Before making any changes, ensure that Outline is completely closed:

  1. Click Outline in the menu bar.
  2. Select Quit Outline (or press Cmd + Q).

🔹 Step 2: Backup Your Cache Folder

Your notebooks are usually stored outside of the cache folder, but to be safe, create a backup before resetting.


For Direct Download Users (from our website)

  1. Open Finder.
  2. Click Go > Go to Folder in the menu bar.
  3. Enter the following path and press Enter:
~/Library/Outline/
  1. Copy the StorageOne folder to a safe location (such as your desktop).

For Mac App Store Users

  1. Open Finder.
  2. Click Go > Go to Folder in the menu bar.
  3. Enter the following path and press Enter:
~/Library/Containers/com.gorillized.outlinemac/Data/Library/Outline/
  1. Copy the StorageOne folder to a safe location.

🔹 Step 3: Delete the Outline Cache Folder

Now, delete the cache folders for a fresh start.


For Direct Download Users

  • Delete the entire ~/Library/Outline/ folder.

For Mac App Store Users

  • Go to ~/Library/Containers/.
  • Delete all folders named “Outline”.

🔹 Step 4: Restart Outline and Reopen Your Notebooks

  1. Launch Outline.
  • Your previously opened notebooks will not appear automatically.
  • Don’t worry! Your data is safe, and you just need to reopen them.
  1. If you don’t remember where your notebooks are stored, use Finder’s search:
  • Type your notebook name or a section name.
  • Look for .one or .onedoc files.
  • Once found, open them in Outline.


After reopening your notebooks, everything should be back to normal! If you still experience issues, please contact us at support@outline.app for further assistance. 😊

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