I'm looking for a professional level dictionary for Portuguese-Spanish, English-Spanish and Spanish-English for Mac

Hi everyone,
I'm a professional translator, and I'm looking for a goos dictionnary on professional pruposes (so, I don't want a simple tool as google translation) from portuguese into spanish. I'm looking for a goosd dictionnary spanish-english. For inglish-spanish, we have the dictionnaries which are conatained into our Mac, which I find wonderful. For me is very important that these dictionnaries could be used of line and directly with Mac.
Many thanks.
IN addition, some days ago, I read a message in wchi someone asked about a grammar tool, but I didnt' read any anser, I would be interested too.
Many thanks
María