Mac Internal file system error: How to resolve?

HFS and HFS+ are the most popular storage media used in Mac OS X to store your important files and folders. Further these storage devices are separated in many volumes which contains sector that is also called logical block in HFS file system. The information related to your important file and folders are stored in catalog file which is also known as directory tree. This directory tree is very much important for an execution of your saved data stored in several volumes. However at time it happens when due to several reasons directory tree gets corrupted or damaged. In such cases users have to encounter internal file system error in Mac.

Whenever user try to access there important files the error message pop ups to display screen and terminates the process. The error message appears in the following given manner:

“ -127 fsDSIntErr internal file system error ”

There are several reasons which are responsible for the occurrence of internal file system error in Mac such as corrupted or damaged HFS file system, internal consistencies in file system, virus infection and malfunctioning of software and many others. In such situation the performance of Mac system gets highly affected and thus makes it unresponsive and unreliable. In order to avoid this problem it is necessary to fix the occurrence of error message. You can perform this task with below given manual steps:

  • Use inbuilt Disk Utility too to resolve corruption of directory tree in Mac

  • Next, rebuild the desktop environment by pressing option and command keys together, until a message appears on the display screen for rebuilding a desktop.

  • Then run FSCK command in single user mode.


If the problem still persists, then you need to reinstall a new Mac operating system. It will fix Internal file system error in Mac. But reinstalling Mac will make your entire data inaccessible. In such cases the only solution to restore your lost data is the third party Mac recovery software. It follows highly advance algorithm and designed with rich user interface to perform the recovery task in quick and simple steps.

You can easily download Mac data recovery software from its site and try out its free trial version. In trial version you will not be allowed to save the data for saving the data you require to buy out the original version.

System Requirements

Processor: Intel Power PC (G4 or later)

Operating System: OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther

Memory: 256 MB

Hard Disk: 40Mb


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