TrueCrypt alternative for Mac OS X I'd need to create an encrypted volume on my MacBook Pro running OS X El Capitan.

It's been a while since I needed to do something like that, I think it was 2010 when I used TrueCrypt.

I know that nowadays its development has been suspended or somehow discontinued, so I was wondering: how to have an encrypted volume with TrueCrypt-like level of security on Mac OS X?
Just use FileVault 2, which comes with El Capitan and is pretty secure.

If you need separate volumes or passwords for different projects, you can also use OS X encrypted disk images with 128 or 256 bit AES encryption. This allows you to choose to store the passphrase for each volume offline, in separate keychains or in the main keychain as you see fit.

The benefit of FileVault is whole disk hardware encryption so you should start there and then layer in encrypted disk images for projects that require even more protection or isolation.