macOS Error Code -43: How to Fix It

Easy 15-45 minutes Low Severity Verified June 2026
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Error Code
Error -43
Brand
macOS
Product Type
operating_system
Severity
Low
DIY Difficulty
Easy
Estimated Fix Time
15-45 minutes
macOS Error Code -43 (also known as fnfErr) appears when the system cannot locate a file or folder at the specified path. This typically occurs when files have been moved, deleted, or the file path has become corrupted, preventing applications from accessing the resources they need.
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Tools You'll Need

How to Fix Error Code Error -43

  1. Identify the Problematic File or Application

  2. Check if the File Still Exists

  3. Search for the Missing File

  4. Check Trash and Recently Deleted Items

  5. Repair Disk Permissions

    Back up important data before running disk repairs

  6. Reset Application Preferences

    Moving preference files will reset all app settings to defaults

  7. Reinstall the Problematic Application

  8. Check System File Integrity

    Only run Terminal commands if you're comfortable with command line operations
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When to Call a Professional

Contact Apple Support or a certified technician if the error occurs system-wide, affects critical system functions, or if multiple applications are consistently failing to find essential files. Professional help is also recommended if disk repair tools indicate hardware failure.

Frequently Asked Questions

What does macOS error code -43 mean?
Error code -43 (fnfErr) means 'file not found' and occurs when macOS cannot locate a file or folder at the specified path. This usually happens when files are moved, deleted, or the file path becomes corrupted.
Can I recover files that cause error -43?
Yes, often you can recover these files by checking Trash, using Spotlight search to find relocated files, or restoring from Time Machine backups. If files were accidentally deleted, stop using the computer immediately and use data recovery software.
Why does error -43 keep happening with the same app?
Persistent error -43 with one application usually indicates corrupted app preferences, missing app components, or the app trying to access files that were permanently deleted. Reinstalling the application typically resolves this issue.
How do I prevent macOS error -43 from occurring?
Prevent error -43 by avoiding manual deletion of system files, properly uninstalling applications, maintaining regular backups with Time Machine, and keeping macOS updated. Also avoid moving critical application files to different locations.
Is error code -43 serious for my Mac?
Error -43 is typically not serious and doesn't indicate hardware failure. It's usually a software issue that can be resolved by locating missing files, repairing permissions, or reinstalling affected applications. However, frequent occurrences might suggest disk issues requiring attention.

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