Harold Allan Mac McNiff was born on September 7, 1933 to Harold Matthew McNiff & Elsie Coker of Los Angeles, CA and went to be with our Father in Heaven on April 21, 2010. Mac graduated Lawton High School in 1951 and got his Bachelors Degree from Phillips University in Enid, OK in 1955. He then began his employment with Oklahoma Natural Gas Company where he was employed for the next 38 years and retired as a Commercial Marketing Consultant. In April of 1960 he married Patsy Mae Brobst. They moved to OKC in 1964 and then to Bethany in 1968 where they remained for the rest of their lives. He received the De Molay Legion of Honor. Mac served on the Board of Directors of Cerebral Palsy, and was serving on the Board of Directors of Office of Disability Concerns and Reliant Living Centers of OK. He was very involved with the CB world as Big Hoss. These clubs raised funds for various charities for over 35 years. He is survived by his son Lester McNiff and his wife Connie of OKC, daughter Piper Pfister and her husband Rusty of Bethany, OK, and his companion of 6 years, Mary Kay Fisher of Bethany, OK, 3 grandchildren, Megan McNiff of Yukon, OK, and Kenna & Seth Pfister of Bethany, OK, and 2 step-grandchildren, Shawn & Mindy Johnson of Mustang and Dawn Johnson of OKC. A sister also survives him, Cynthia Frederick of Calabasas, CA and a brother-in-law, Art Michener of Sun Valley, CA. Words cannot express how much he will be missed. Services will be held at Mercer-Adams Funeral Home on Saturday, April 24, at 10:00 am. He will be laid to rest at Resurrection Cemetery in OKC, OK. Memorials may be made to Reliant Living Centers of OK, Inc. located at 3317 SE 18th, Del City, OK, 73115; 677-2421.