I have a MacBook Pro 8,1 (13", 2011 unibody) running Yosemite (no upgrades). Tried to partition my SSD hard drive and it threw an error when it was almost through saying it can't find the partition.
I searched and found this fix (Can't create partition on free space with Disk Utility) successfully got to step 11, but when I try step 12 I get the error -69711. Does anyone have any suggestions, I'm stuck.
diskutil list,diskutil cs listandsudo gpt -r show /dev/disk0. Do you boot to Internet Recovery Mode? – klanomath Sep 29 '15 at 16:16