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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: 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 3: Validate your Fonts using FontBook

macOS comes with a simple to use utility named FontBook you can use to validate and remove any fonts that display errors during the validation process. This article discusses how to validate the fonts in macOS, and this article discusses removing and disabling fonts. 

Solution 4: 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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