![]() Enter diskutil list and gpt -r show /dev/disk0.Then boot to Internet Recovery Mode and open Terminal.Apparently it will be formatted as a HFS+ Journaled volume. Or use the +-button and create a new volume. This should create unallocated free space use the handle and resize Macintosh HD.Since adding a new partition with the +-button doesn't work properly for you, you have two options: Trying to add a new partition (by using the +-button) or to resize Macintosh HD (by using the handle) with Disk Utility will downsize partition 2 and move partition 3 to the new end of partition 2. The partition with the index 4 is your NTFS volume WinB (also visible in the second screenshot). The partitions with index 2 and 3 are your main OS X volume named Macintosh HD (also visible in the second screenshot) and your Recovery HD. The partition with index 1 is your EFI partition. ![]() System specs: Macbook Pro 15 (mid 2010), Yosemite 10.10.5 ![]() Sorry for only two pictures, apparently I cant post more than two links Remove the new HFS+ volume with gpt and its index number found above: Specifically Id like to know what this step does or whats causing the problem, As you can see it does not show up as free space, or at least it does not show up in finder as a free space partition. I tried dragging the hdd box within disk utility as mentioned and have posted the results. However I cant make that free space anymore, as i said before i cannot create a partition of format "free space" within disk utility. ![]() I got around this error once by creating free space and partitioning/formating it within the windows installer. When I tried to install windows to that partition at index 4, I received an error saying that the selected partition is of MBR and i need GPT, which indicates to me some sort of hybrid mode where mac reads gpt and windows reads mbr. The partition at index 4 was created using the terminal (but it couldve been created using the plus minus in disk utility), and i have no problems whatsoever creating non-free space partitions with either of these methods. I am still trying to install Windows while I am waiting for answers, so it was intentionally added and does not affect my problem. also please ignore the separate NTFS partition. Is there any reason this would be happening? Is there anyway to force a "free space" partition to be created To clarify: when I try to create a partition of "free space" using disk utility, it is formatted automatically and against my will to HFS+ Journaled. I go to disk utility, click on my harddrive, partition, then the plus at the bottom and select free space, resize to 50 GB and apply. I have more than enough room.I managed to do it once earlier today, but now whenever I try to create the free space partition it automatically formats it to the journaled mac os. This is for Windows if that matters, and is independent of Boot Camp. The latest update to Disk Utility removes a lot of options from the GUI, but overall, I have yet to find a scenario where a task I need to perform isn’t still available, if only from the command line.I've been trying to partition my harddrive to have ~50 gb of unallocated space (right now there's one partition with the operating system on it, so I would like to have that plus the free space). To erase a volume called /Volumes/Seldon, use the same structure of the command, but this time without the freespace option: You can also secureErase a volume itself. For example:ĭiskutil secureErase freespace 0 /Volumes/Seldon > /var/log/secureeraselog.tmp If you were to automate the command then you would want to dump the output into a log file. In this example you would use the following:ĭiskutil secureErase freespace 0 /Volumes/Seldon So for example, let’s say you had a volume called Seldon and you wanted to do a standard Single-pass zero-fill erase. The levels are as follows (per the man page as not all of these are specified in Disk Utility): The format of the command to secureErase freespace is:ĭiskutil secureErase freespace To do so, use the diskutil command along with the secureErase option. But you can still securely erase whatever you’d like (other than you boot volume obviously), when needed. Additionally, there’s no option to Secure Erase free space on a volume. One of the options thats a tad bit hidden in OS X is the Secure Erase option, which runs a multi-pass erase on a volume.
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