It may be possible to combine steps 1 & 2 into 1 step, by only issuing the diskutil command. I.e., diskutil eraseDisk JHFS+ STORENGO disk3ģ) Select the whole disk in a Finder window, right click on it, and then select 'encrypt'. I selected the drive itself.ġ) Erase the USB with the Disk Utility gui, setting the format as OS X Journaled.Ģ) Erase the USB using the diskutil 'eraseDisk' command. Finder did not show a partition to encrypt. I was able to encrypt the drive by selecting it in a Finder window, and right-clicking on it. Then I checked it with the gui, for ha-ha's, and found that the USB drive still did not show any partitioning. I checked the USB drive with diskutil, and it showed that it had been partitioned. So I then erased the USB drive using the diskutil 'eraseDrive' command, formatting it as JHFS+. I checked the USB drive using the diskutil 'list' command, and it showed no partitioning.
After the USB drive was erased, no partition was shown in the gui. There was no option to erase it and reformat it as OS X Extended (Journaled) Encrypted. So I erased it using the gui and formatted it as OS X Extended (Journaled).
The Disk Utility gui showed no partion on drive, and there was no partitioning option available in the gui (partition button was greyed out). Ziatron: I recently upgraded to El Capitan, and I just ran into the same issue with a Verbatim 16gb 'STORE N GO' USB drive, which I wanted to encrypt.
