Reclaiming Bootcamp Partition

[Aksta]

I am trying to reclaim some greyed out space on my hard drive which was vacated due to boot camp. When I drag and extend the partition and click on apply it gives me a

Partition failed with the error: Couldn't modify partition map because file system verification failed.

Any ideas how I can get it back?

 

[Freyqq]

Post a screenshot of disk utility in the partition tab. That would really help see the issue.

 

[FastEddiebags]

Are you trying to get rid of your bootcamp? If so, just go back to bootcamp assistant and click the uninstall option.

 

[Aksta]

In the end I just did a re install / recovery and when i tried to do a drag resize it let me do it.