Updating boot support partitions for the volume dating to relationship

Rated 4.6/5 based on 620 customer reviews

If you go a route aside from simply reinstalling Mac OS X, you may lose data.

Finally, something else to keep in mind is that sometimes damaged or broken EFI partitions can be an indicator of an impending disk failure, or some other problem with the hard drive.

If you have attempted to partition a drive from Mac OS X and received a “Partition failed” message with the error “Couldn’t modify partition map because file system verification failed.” you can fix the problem with the file system check command line utility.

To issue the file system check and repair function properly, you’ll need to boot into Single User Mode as well.

You can also use the ‘fsck_hfs’ command if desired.

updating boot support partitions for the volume-46

updating boot support partitions for the volume-73

If that doesn't happen, or you experience any of the following issues while using Windows on your Mac, follow the steps in this article.

At this point, you can go ahead and partition the drive as usual, this time without any such “Partition Failed” error message appearing in Disk Utility.

Often users may see this error when attempting to partition a Mac boot drive for dual booting or for some similar purpose.

If that’s the case, all you need to do is reinstall Mac OS (or Mac OS) as usual and it should be fixed in the process: Assuming you choose to simply reinstall Mac OS X and you don’t attempt to format the drive or do anything else, then only the Mac OS system software will be replaced and the EFI partition will be recreated in the process.

In other words, no personal data, files, or apps should be lost in the process if all you are choosing to do is reinstall Mac OS X.

Leave a Reply