Mac Data Recovery After Interrupted Partitioning Process

Mac hard drive partitioning is widely adopted by users to organize hard drive’s data better, install multiple operating systems on the same machine, or dedicate some hard drive space for backups. The process which on the surface seems pretty simple (via a couple of clickable steps in Disk Utility or a third-party partitioning tool) is quite complicated internally. It involves interfering with Mac’s partition table, and every modification in the table affects all partitions or volumes present on the drive.

Considering the sensitive nature of the operation, it isn’t tough to imagine what an error could do. Any human or technical interference or interruption in the process could have disastrous effects like system crash, hard drive corruption, partition table deletion, or permanent data loss or inaccessibility. Though users generally take appropriate precautions while performing such a critical operation, sometimes, errors happen unexpectedly. Thus, knowing how to bounce back from them is the only way to play safe.

First things first – What effects an interrupted partitioning operation could have

Before we proceed to the fixes, let us paint you a clear picture of the kind of situation your Mac can land into if hard drive partitioning on it is interrupted. This will ensure you take all measures necessary to avoid it from happening such as connecting your Mac to charging and USP when partitioning, etc. Remember, even if the process is taking a couple of hours to complete or longer than you expected, DO NOT force quit it. If you do, any of the following could happen:

  • Mac could boot until half of the loading bar, stay there, and shut down after some time
  • It could unexpectedly start “repairing” the disk and then say that the operation “failed”
  • Trying Verbose Boot or Command + R boot could fail
  • It could throw an error saying “Can’t connect to the Apple support” and stop

How can this be fixed for free?

There are a couple of quick fixes that you can try to solve this issue.

  1. Try Command + R with a network cable attached and install OS X to another location or another external disk
  2. Try Mac hard drive recovery by creating an installable USB drive which you can boot from. For this:
    • Download Mac OS from the App Store
    • Format a USB to Mac OS X Extended (Journaled) in Disk Utility and name it Untitled (very Important)
    • Launch Terminal and execute this command:

    sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Yosemite.app —nointeraction

As soon as you can boot, backup all your data. If, however, the above-mentioned tricks fail to solve this problem, instead of hit and trials, resort to the Safe & Secure application Stellar Mac Data Recovery.

The Bottom Line

You are now familiar with the ways by which you can resolve to partition recovery issues on Mac-based systems. While you may attempt the free fixes in the first place, if, however, they do not serve the purpose, then Mac Drive Recovery solution is the best bet!

Install a data recovery software on an external drive and begin recovery on your start-up disk.

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