Mac OS X
In most Mac OS X applications, the key works differently than on other platforms. When the key is pressed, the window scrolls to the bottom, while the cursor position does not change at all; that is, the end key is tied to the window, not the text box being edited. To get the same result as the Windows platform (that is, going to the end of the current line of text), one could press ⌘ Command+→. In most single-line text fields, one can also instead press the down arrow key.
Read more about this topic: End Key