The anthem We're Not Brazil, We’re Northern Ireland was sung by hundreds of mourners as they paid their last respects at Ballygowan Presbyterian Church.
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Originally from Rathcoole, Co Antrim he was capped 52 times for Northern Ireland, scored three goals and played in the 1986 Mexico World Cup.
Famous former team-mates including Gerry Armstrong and Pat Jennings, past Northern Ireland managers Nigel Worthington and Sammy McIlroy as well as current manager Michael O'Neill also attended the service.
BBC sports commentator Jackie Fullerton, told mourners that family and friends were “stunned and devastated”.
Below are some of the tributes posted on the Belfast Telegraph's online Book of Condolences for Alan
I couldn't believe the news when i heard of Alan's death. He was a larger than life presence on the pitch and did his wee country proud. He was straight talking and that's why he was so loved by the fans. i have many happy memories from the 80's watching Northern Ireland. Thanks for that Alan and my heartfelt sympathy to Alan's wife and children. Julieb70
Alan attended my secondary school, Faraday, when he first came to London. We then met up again when I worked at QPR on match days in the executive box reception. I have very fond memories of Alan, he was a real gent and such a laugh. My thoughts and prayers are with all his family and friends. R.I.P MAC, gone but never forgotten. Bolter66
Cannot begin to describe how much sadness that is felt with the loss of a great man and uncle ...may the lord bless you and keep you may the lord make his face to shine upon you and give you peace love from nephew David Colleen and Daniel xxxxxxx HColeen88
Alan will always be a legend to me, a NI supporter who when living in Belfast would watch him at Windsor Park, I cannot remember a player who was visibily more proud to wear the green shirt..and at Wembley his post match reaction will forever make me smile...When I moved to England I worked with lifelong QPR fans who worshipped him as a QPR 'legend' in the same way..they will be equally as shocked and saddened as I am. Alan that game was never a fix ..RIP a true legend, AndyAscot
Ive been a QPR fan all my life and BIG MAC is and always will be my favourite player in the blue and white hoops.. My deepest sympaphy to all of alans family and friends we have all lost someone special and a legend in life. Waynee1972