Delete Partition El Capitan

How did you do this??

Grate

Hi, Ive done all of these steps correctly but am finding that I can not select the Drive i want to remove. ( - )

DU won't let me select any of the drives unless its the main one and I can only make it smaller.

I am having the same problem on my iMac running OS X 10.11.5. I select my extra partition, erase it, then select the all drive, but when I select the extra partition, it has the ➖ option greyed out and only allows me to continue to ➕ and created more partitions from that one? I just want to merge the secondary partition back to the main Macintosh HD? IS this possible?

Hey dude, I found that you need to erase everything off all of your drives. Only until then will it let you merge everything back into one by partitioning the main drive again.

Thanks! I have cleaned and backed up any files i wanted to save and was considering just reformatting/reinstalling the entire system back for a nice pristine OS X again. I assume I will have to do this remotely from another mac computer connected to my iMac? Does that sound about right?

OMG! Thanks I was on the phone with apple for about an hour yesterday telling me to do pointless stuff that i have already tried. LIFESAVER!

There's an easier and maybe more thorough way of doing this.

I realize this is an older post but it still came up close to the top of a Google search some I'm posting this so it may help future searchers.

I found the following procedure at http://www.macworld.co.uk/how-to/mac/delete-boot-camp-partition-from-mac-3496241 /

1. Make sure that nobody else is logged on (log out other users by switching to them and choosing Apple > Log Out)
2. Quit all other open apps
3. Launch boot camp assistant and click Continue
4. Select Remove Windows 7 or later version then click Continue
5. If your Mac has a single internal hard drive, click Restore
6. If your Mac has more than one drive select the Windows disk and click Restore Disk to a Single Partition then click Continue

Boot Camp Assistant will then go through the process of removing the Windows partition from the Mac.

Note that all the files will be deleted from the Windows disk so be sure to backup all important data from the Windows partition before removing the partition. This does not remove the Boot Camp Assistant from your Mac, which will remain in the Applications folder (it’s best to keep it around in case you need it again).

After performing the above procedure I also found Boot Camp: Remove Windows from your Mac from Apple.

Hope this helps anyone else like me that 1) Realized that I just missed the free Windows 10 upgrade and 2) Realized I haven't booted up in the last 2 or more years and done anything other than spending a couple of hours upgrading everything Windows and 3) Realized I have better use for the 250GB of space the Bootcamp partition for an unused Windows app was using.

Wow, that's a lot of realizing. :-)

Help! I'm having this problem, but when I got to the pie chart step, I clicked on the BOOTCAMP partition and the " - " sign was greyed out! What to do now? I need this space. Any help would be greatly appreciated. Thanks

In Step 4, the checkbox for Remove Windows isn't available