Bug 476673 left one key combo wrong - "Discontinue Text Styles" which should be Accel+Shift+Y instead of Accel+Shift+T.
I also found out that "Delete Next Word" is Opt+Del on Mac by trying.
The delete key is a bit tricky on mac, because the Backspace key is sometimes named as "Delete" (probably on older keyboards and on smaller keyboards without the numpad). We call the mac Backspace key "Delete (Backspace)" in our docs, so hopefully it's more clear saying "Del" for the delete forward key (on my keyboard it's named "delete"...)
Created attachment 443899 [details] [diff] [review]
Feel free to bump this to a mac person if you're unsure about the mac part.
Comment on attachment 443899 [details] [diff] [review]
As long as you are happy that Opt+Del is descriptive enough for OS X users