How do you put in diacritics (tashkil)? Can you use a regular English keyboard and do phonetic transliteration?

That is possible under Mac if you use the "Arabic QWERTY" keyboard. See this link for instructions http://katibapp.com/help/arabic-on-mac/#learnersofarabicwill...

Additionally, you can use the "Keyboard Viewer" when Arabic is selected as a keyboard layout and hold shift. This will show you which keys render diacritics.

This looks very nice, well done. Too expensive for me, but still nice.

Very cool! Downloading now.

Great, thanks for this!