Unable to encrypt USB / El Capitan

Using a Macbook Air running El Capitan 10.11.4...

(Sorry if this is the wrong forum, but I've never understood how to navigate to the right place n communities Support from Apple).

I tried (for literally a few hours) to find how pw - protect / encrypt a new USB key. Although I have read and followed the instructions to more than a dozen son / pages online, * nothing * works, because my system does not simply offer the options described. To cut a very long story short, I used disk utility to erase the drive, but never did have the option of "password" on the screen "next" mentioned repeatedly - there is no next screen, just a local saying 'Done '. Then I discovered several discussions mentioning the need to partition the USB key to encrypt - that seems weird to me, but I guess I'm out of my depth. Anyway, "Partition" is always grayed out. I * so * found son saying that, so the partition, I first need to choose "GUID" partition of the table - but absolutely nowhere in the process are only some sort of partition of an option. At no time do I get nothing except a NAME box, a box of FORMAT and DELETE / CANCEL.

Oh - on another (official, Apple) help screen, he said in El Capitan, you could simply Ctrl-click on the USB in the Finder. (Interestingly, no other screen I saw didn't mention this.) Of course, that appear a box to enter a new password... followed by the error message that I must first of all put in place a GUID partition table.

Naively, I thought this would be a three-minute operation, but I'm completely stumped.

You can only encrypt a drive formatted for Mac.  If this isn't the case, you will need to format will erase the drive.

In disk utility, select the drive and delete it. As the format, select Mac OS extended (journaled). That will make a table partition GUID.

Tags: Mac OS & System Software

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