Software⏱️ 3 min read📅 2026-06-11

How to Fix: How can I resolve the error "MediaKit reports partition (map) too small"?

Error resolving MediaKit reports partition too small on Mac.

Quick Answer: Expand disk space using Disk Utility or consider upgrading storage.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🔧 Proven Troubleshooting Steps
  3. 💡 Conclusion

The 'MediaKit reports partition (map) too small' error occurs when the macOS operating system is unable to expand your Mac's hard disk due to an insufficiently large partition map. This issue affects users who have tried to increase their storage capacity but are encountering this specific error message.

This error can be frustrating as it prevents users from expanding their storage and may lead to a loss of data if not addressed promptly. In this guide, we will walk you through the steps to resolve this issue and regain access to your full storage capacity.

🛑 Root Causes of the Error

  • The primary reason for this error is that the partition map is too small to accommodate the additional disk space required. This can happen due to various reasons such as a failed disk repair, an insufficiently large startup disk, or issues with the Disk Utility app.
  • Another possible cause of this error is that the disk partition table has become corrupted, preventing the system from recognizing the available storage capacity.

🔧 Proven Troubleshooting Steps

Reformatting and Reinstalling macOS

  1. Step 1: Boot your Mac in Recovery Mode by restarting it and immediately holding down the Command + R keys. This will launch the Recovery Mode interface.
  2. Step 2: From the Recovery Mode menu, select Disk Utility and click Continue. Select the disk you want to expand from the left sidebar.
  3. Step 3: Click on the 'First Aid' tab at the top of the window and click Repair Disk. If the repair is successful, your Mac should be able to recognize the additional storage capacity.
  4. Step 4: If the repair fails, try using the 'Restore from a backup or Time Machine backup' option to restore your Mac to a previous state where the disk expansion was possible.

Using Third-Party Disk Expansion Tools

  1. Step 1: Download and install a third-party disk expansion tool such as Disk Utility's 'Disk Utility for macOS High Sierra' or 'iMerape'. These tools can help to expand the partition map by creating a new partition table.
  2. Step 2: Launch the installed tool and follow its instructions to select the disk you want to expand. Be cautious when using these tools, as they may cause data loss if not used correctly.

💡 Conclusion

Resolving the 'MediaKit reports partition (map) too small' error requires a combination of troubleshooting steps and potentially reinstalling macOS or using third-party disk expansion tools. By following these methods, you should be able to regain access to your full storage capacity and resolve this frustrating issue.

Did this fix your problem?

If not, try searching for specific error codes.

🔍 Search Error Database

❓ Frequently Asked Questions

🛠️ Related Fixes

How to Fix: Pc crashes shortly after launching game (rainbow

Fix Pc crashes shortly after launching game (rainbow six siege). Compl

How to Fix: Installing an APK on a locked down phone

Installing an APK on a locked down phone: Try using a rooted device, e

How to Fix: New PC build- no signal and no clue

Fix New PC build- no signal and no clue. Complete troubleshooting guid