Blender has implemented most (not all) of the common shortcuts for text editing.
See the list here . I guess there’s more but I'm fine with the selection.

Some of those however are wrong on the Mac.
Here is an overview of the most common text editing shortcuts.

red = wrong
yellow = not implemented

This patch implements the missing and wrong shortcuts.

On a side note: the Text Editor does not use the keyboard cursor logic from this file. It is mostly driven by the user keymap. Changing thos defaults would be different Patch.