Thanks to Marco Sartori, a new input method is availble for typing Cuneiform script, which is used to write various languages of the ancient Middle East. It can be downloaded from this page.
Put the .inputplugin file in Library/Input Methods or Home/Library/Input Methods, logout/login, and then activate it via the plus button in System Settings > Keyboard > Input Sources. Look for it in the Simplified Chinese area. A Readme file should be included which explains how to use it. If you find problems or want to suggest improvements, you can contact Marco at firstname.lastname@example.org
Here is some earlier info on Cuneiform from this blog.