Error has occurred while preparing installation
Error has occurred while preparing installation

Encountering installation errors can be frustrating, especially when they halt the installation process. One frequently encountered message is “An error occurred while preparing the installation. Try running this application again.” This guide explores various causes and resolutions for this error.

Causes of the Error

  1. Corrupted Installation File: This can occur during download or transfer, causing the installation to fail.
  2. Incompatible System Requirements: The application may require specific system configurations that your Mac doesn’t meet.
  3. Software Conflicts: Conflicts with existing applications can prevent successful installation.
  4. Anti-Virus Software: Some anti-virus programs might block new software installations.

How to Fix the Error

  1. Redownload the Installation File: A fresh download might resolve issues caused by file corruption.
  2. Ensure System Compatibility: Verify that your Mac’s operating system is compatible with the software you’re attempting to install. You can check this compatibility in the App Store under the Information section of the software listing​​.
  3. Adjust Date and Time Settings: Incorrect system date and time settings can cause installation failures. Ensure they are set correctly in System Preferences or adjust them using Terminal if needed​​​​.
  4. Install in Safe Mode: Booting in Safe Mode starts your Mac with the minimum required software and can help bypass software conflicts​​​​.
  5. Use macOS Recovery: This method involves restarting your Mac and using specific keyboard combinations to reinstall or update macOS​​​​.
  6. Combo Update: If updating within the same major macOS release, a combo update can be an effective solution. These updates are available as dmg files on Apple’s website​​.

Preventing the Error

  1. Download from Trusted Sources: Ensuring the source of your download is reputable can prevent corrupt files.
  2. Check System Requirements: Verifying compatibility with your Mac before installation can prevent many issues.
  3. Update Anti-Virus Software: Keeping your anti-virus program up-to-date can minimize conflicts with new installations.
  4. Use Safe Mode for Troublesome Installations: If you frequently encounter installation issues, starting in Safe Mode can help isolate the problem.


While the error “An error occurred while preparing the installation” is common, it can often be resolved through simple steps like checking system compatibility, adjusting date and time settings, or using macOS Recovery and Safe Mode. By understanding these solutions, you can reduce the frustration associated with software installations.

FAQs on Installation Errors

  1. What does this error message mean? It indicates a problem during the installation process, potentially due to file corruption, system incompatibility, software conflicts, or anti-virus interference.
  2. How can I fix this error? Solutions include redownloading the file, ensuring system compatibility, adjusting date/time settings, using Safe Mode or macOS Recovery, and applying a combo update.
Eric Chan

Hi! I’m Eric and I work on the knowledge base at  You can see some of my writings about technology, cellphone repair, and computer repair here.

When I’m not writing about tech I’m playing with my dog or hanging out with my girlfriend.

Shoot me a message at if you want to see a topic discussed or have a correction on something I’ve written.

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