Option to remove partition disabled

I have a 2 TB internal SSD in my Mac Pro 3,1 (early 2008). It's run on a PCIe controller. The drive is an OWC Mercury Extreme Pro 6G.


The SSD had been split into two different partitions -- let's call them NEWSSD and OLDSSD. Space was split 50/50.


My objective:

1. Delete the OLDSSD partition

2. Move the space allocated to OLDSSD to NEWSSD, so there's a single partition using all 2 TB of the drivespace.


I have erased OLDSSD, and it is now empty. It is formatted as HFS+ -- OS X Extended (Journaled).


NEWSSD has data on it that I do not want to lose. It too is formatted as OS X Extended (Journaled).


In Disk Utility, the option to remove OLDSSD partition is grayed out. It is enabled for NEWSSD oddly enough.


I rebooted into Recovery Mode, hoping it would work from there. It is still grayed out there.


Disk Utility also gave me an odd error saying the volume OLDSSD is not journaled and thus cannot be resized. It stipulated to enable journaling under the File Menu. It actually is journaled. If I hit Cmd+I, the info panel for the partition clearly indicates it is journaled. It does the same for NEWSSD.


(Note that's at the partition-level. At the drive level, the info pane says it is not journaled, of course.)


Enable Journaling on the file menu appears to do nothing when I select it.


I tried mounting and unmounting both drive partitions. I'm getting no where.



How can I do this? I want to delete the old partition and resize its empty space into the other partition.


I'm running El Capitan.



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Well, you're definitely right. I found that both Disk Utility (GUI version) and diskutil (cline) had the same limitations, but it is definitely unique to Apple. There are multiple 3rd party options that can handle such partition changes, and they do so effortlessly. I use Paragon Software's Disk Manager to fix this, and it had no problem accomplishing the above without having to reformat and start all over again. I believe the difference is that its software can not only resize a partition but physically move it by changing the left and right borders of the partition, effectively moving the second partition in the list before the old one. Ordinarily, SIP would also be an issue, but it includes a function for building a bootable USB drive with their software built into it, so it can be run from recovery mode in order to bypass SIP. Problem solved.

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