Yes, of course I did a search first. I see several "help" sites on the internet that purport to show how to place encryption on a flash drive. None of the various methods shown work for me. Several have copied the same instruction and reposted it, but it is something that doesn't exist on my iMac. Others have shown shots of menus that I don't have. Either the Mac OS has encryption built in or it doesn't, and if it does, why can't I access it? Has anyone here actually done it? If so, can you explain how it is done? What I've tried: Disk utility. My menu is different, and does not include the option for "encryption". I did follow the instructions to create a disk image, which gave me one, and sometimes two copies, but neither were password-protected on any of the several tries. Finder: As in the above method, my menu does not have the option for "encryption". If the Mac OS simply does not have encryption builtin, then I will purchase a software, but I would like to at least try to do it with a feature that is claimed to have been included in my OS. My OS: And, of course, "Mac Help"