macbook pro volume could not be unmounted

Once the volume is erased, you now have to merge the partitions.The volume being erased has to match the first volume’s file format else there would be unexpected data loss. JHFS+ is short for Journaled Heirarchical File System Extended, or in a nutshell, the file system used by OS X. Here, instead of disk0s4, use the correct volume identifier as per the table you saw when you entered the list command. Use the following command:ĭiskutil eraseVolume JHFS+ drive /dev/disk0s4 From here, you would have to select the partition you want to recover and erase it. It should show you a list similar to the above screenshot.

Type in the below command and press enter.In case you ever get stuck in a situation where you are unable to recover a partition on your Mac, follow the below steps: How to delete a partition through macOS Terminal

A little research through Apple’s support documentation for the right OS X Terminal commands led me to the below solution. From prior Windows experience, this reminded me to take the command line route, or Terminal, in case of Mac. So, here I was, left with half of my disk space on my MacBook Air (I have the 128GB variant). Google Chrome updated with new Memory and Energy Saver modes for macOS

Macbook pro volume could not be unmounted