I found this thread while wanting folders that sort after Z in Finder on Mac OSX. After several false paths and trial and error, here's what I found:

Characters that sort after Z in Finder (in sort-order)

• z Lower case Z
• ι Greek letter
• Ι Greek letter, capital version of above character, not an "I")
• Ω Omega
• 一 Japanese Character? (Thanks, Jam)
• 口 Japanese character? (Thanks, Jam)
• 末 Japanese character "End" (Thanks, Jam)
•  (a private use character) (Thanks, Peter O.)

These are characters others here and in other places on the web, mentioned sort after Z, but that I found DO NOT sort at the end, at least when sorting by name in Finder on Mac:

† ∆ ~ - ſ [ ø ￭ |

The Special lead-in Character that will put your folder at the end of the list without having to resort to using the "z" combo: U+E83A: Private Use. In fact, I believe any of the Private Use characters will work. () Just copy and paste the character between the brackets.

Don't mess up things using strange characters!

I would not suggest using Private Use characters or non-printable characters because they can really mess up the things when you access your folder from terminal or programming languages. I had annoying issues using 末 or other special characters.For example, using Python 2.7, this is how you will see your folders with the non-printable characters Ω, 末, 口,.

os.listdir(os.getcwd())Out[2]: ['\xe6\x9c\xab ', '\xe5\x8f\xa3 ', '\xce\xa9 ', '\xee\xa0\xba ']

For someone or something using your folder structure, accessing the folder would be very confusing (and you can see it from the comments like this to the top answer).

So I created a folder with this at the beginning of the name on my Sharepoint drive and now it's there and I can't access it or delete it. :| – Rather Notsay Jun 28 '16 at 21:05

Of course, you can print them, but why make the things so unnecessarily complex? If you want to stay on the safe side, I would suggest using standard characters. Which is the last one depends on your File manager. So here is some code that creates a bunch of folders with all the printables strings in Python so you can test your file manager.

import osimport stringfor i in string.printable:      try:            os.mkdir(i)      except OSError:            print('OSError for %s' %(I))

Once you have sorted by name you can get your answer.

For Windows 10 - Explorer

using standard characters after z up to my knowledge there is only zz and so on.

So using zzNameOfTheFolder is an easy and safe way to do to that. So even if it's not nice I would recommend it.

For Mac OS X El Capitan - Finder

The z is the last character but note that there is no distinction between capital letters so a folder named zz can't be stored in the same directory of a folder ZZ

For Ubuntu 16.04 - Nautilus

The hashtag # is the last character. But if you want some more compatibility with other file managers I would use ZZ.

Something more elegant than "z_item"?

I guess this depends on your own concept of elegance and I think StackOverflow should diffuse best and safest practices, not the most elegant. However, in many cases, symmetry can help. What about these safe perhaps more elegant solutions:

ZZFoldernameZZZz-Folder name-zZzZ-Folder name-ZzzZFolderNameZzzzFoldernamezz