about us

Though her firm, Mary Mac & Company, was only founded in 2004, Mary McWilliams has been immersed in design for two decades. She managed a showroom at the Atlanta Decorative Arts Center, and then went on to a career as Director of Interior Design for Southern Living magazine. In that position, aside from producing feature articles and design books, she was responsible for development, construction and interior design of all the magazine’s show houses, and also hosted programs on HGTV. The ability to juggle numerous complex projects with finesse is a skill her clients can appreciate. “I am all about details,” says Mary Mac, “those layers upon layers that make a house truly a home.”


Mary Mac favors a traditional approach that’s “timeless, not trendy. It makes for design decisions that have a longer life.” In the same spirit, she guides clients to make “investments, not purchases.” That’s not only a benefit to them, but a source of satisfaction to her. “The best part of being an interior designer,” Mary Mac says, “is creating lasting environments for the places that matter most – our homes.” 


Mary Mac often used the color red in her Southern Living showhomes. In fact, there’s a Valspar paint #858B-3 named for her, Mary Mac Red.






traditional home magazine (2017)

b-metro magazine (2017)

southern home magazine (2016)

southern style magazine (2016)

southern living magazine

southern living step by step magazine

atlanta homes and lifestyles magazine

french country magazine

television | radio


nationally syndicated television special for southern living "our holiday memories" which aired nationally with special guest, dixie carter

many morning show appearances throughout the south

radio interviews

magazine features
traditional home
southern home
southern home
southern home
southern home

contact us

contact information


Custom residential interior design, space planning and construction, project management, commercial clubhouses and related facilities, custom designed furniture and cabinetry.


Holiday Decorating


Event planning, specialty parties, and floral design.


Speaking engagements relating to interiors, floral design, and entertaining.