I will add my endorsement of VectorWorks for Macs. Our use goes back to 1996 and we have had very little trouble bringing new employees up to competence. It is very intuitive and is designed for Architects with Walls, Windows, and doors. Importing AC .dwg's is simple and yields usable plans.
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Theodore Streibert AIA
Streibert Associates Architects
Chatham MA
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