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What to do if Logos Crashes | Mac

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Troubleshooting an Application Crash in Logos or the Logos Indexer


You receive an error, "Logos Bible Software (or Indexer) quit unexpectedly" or the Logos application closes abruptly while opening or performing a specific task.

Note: It is not recommended to attempt these solutions unless the problem occurs more than once. Sometimes an external variable can cause a "fluke" or one-time crash. These instructions are intended to resolve a recurring issue.

  • Solution 1: Update Logos

  • Most "crashes" occur if Logos is out-dated and has not had an opportunity to auto-update. They can be avoided by manually updating or replacing the application file.

    1. Quit Logos and open Finder.
    2. Navigate to the "Applications" folder.
    3. Locate the Logos Bible Software application.
    4. Move it to the Trash (does not delete books or index).
    5. Download the latest version.

    Tip: It is also recommended to run Software Update to ensure your Mac has all the latest updates from Apple.

  • Solution 2: Open to blank layout

    1. Open the Applications folder.
    2. With the Command key held down open Logos.
    3. When the sign in window appears release the Command key and click "Sign in." (Logos should open to a blank layout)
  • Solution 3: Check Font Book for Corrupt Fonts

  • Logos loads fonts from the Font Book when opening. If an incomplete or corrupt font has been detected, Logos may crash while loading it. Use the steps below to check for and remove bad fonts.

    1. Download the MacFontTest Tool.
    2. Extract the FontTest application (if it didn't extract automatically).
    3. Open FontTest (use Control-click if you receive a warning dialogue about the file being created by an unknown developer).

    FontTest will attempt to load all fonts in the Font Book. If a bad font is detected, an error will be displayed. Delete the last font loaded before the error, then repeat this process until no errors occur.

    Below is an example of what will appear if the Mac FontTest Tool finds a corrupt font.

    Checking CappioExtrafrisky 
    display name: CappioExtrafrisky
    Checking Cardigan
    display name: Cardigan
    Checking Caricature
    display name: Caricature
    Checking Carolus Roman
    Bus error: 10

    In the above example "Carolus Roman" should be removed from macOS' using the FontBook application in macOS' Utilities folder inside Applications.

  • Solution 4: Open Logos to a blank layout

    1. Press and hold the Command key down.
    2. Open Logos with the Command key still depressed.
    3. When the sign in window appears release the Control key and click "Sign in." (Logos should open to a blank layout)
    4. To navigate to the home page click the house icon in the top left or use Logos as you normally would.
  • Solution 5: Report the Problem

  • If the above steps do not resolve the issue, please visit Diagnostic Logging for Mac to report the issue. Including specific steps you took to cause the crash will expedite the troubleshooting process.

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