At the age of fifteen Mac and friends Tony Lancett and a young drummer named Simon Kirke joined a band called "The Maniacs" in their native Mid-Wales, playing all over their local area of Presteigne, Radnorshire. After a couple of years playing barn dances and village halls, guitarist Tony bought the album "John Mayall's Bluesbreakers". The three of them had found a new musical direction - raw British blues rock. They left the Maniacs and formed a new band - the "Express Blues Band" and that is where they stayed until their school days were over.

The three moved to London. Simon went on to drum for "Black Cat Bones" the legendary "Free" and "Bad Company", and Tony became a sound engineer, spending twenty years in Toronto Canada and winning awards for his work.

Initially, Mac got a day job and lived in his van, parked behind Clapham Common tube station in South London. Six months later, after answering an ad in the Melody Maker music paper, he joined up with Mick Clarke and Bill Thorndycraft and became bass player with the newly formed "Killing Floor". Drummer Bazz Smith was the next recruit, folowed by Lou Martin on piano. The year was 1968.

Through Simon and Paul Kossof, originally the guitarist with Black Cat Bones, Mac got to know "Free" singer Paul Rodgers, eventually sharing a flat with him in London. While Killing Floor made two albums and worked steadily all over Britain and Europe, "Free" became a huge name with their number one hit "All Right Now", and later, when "Free" and "Killing Floor" had finally split up, Mac joined up with Paul in his new band "Peace". The band had a short but vivid career - playing just one radio session for John Peel on Radio One, and touring with Mott The Hoople on their "Mad Shadows" tour. Five timeless studio tracks were recorded: "Lady" "Seven Angels" "Like Water" "Pawn in the Game" and "Heartbreaker". No album was ever made, but "Lady" appeared on the "Free Story" album. "Peace" split when "Free" was briefly reformed.

After the traumas of Killing Floor and Peace, Mac took off for Europe and played in the house band for Club Mediteranee, Villars, for the next three months. Eventually "cabareted out" he returned to Britain to play with the British blues band "Jellybread" who were signed to Mike Vernon's Blue Horizon label, and the band worked hard around Britain and Holland.

A year later Mac joined up with his friend Barry Paul, ex "Heavy Metal Kids", and moved to Denmark, where they worked with "Life", a rock band based in Copenhagen. However, after a few months a call from London brought Mac back to England to join the reformed American band "Daddy Longlegs" - again featuring Mick Clarke on guitar and just beginning a hectic work schedule around Britain. The band toured steadily around the UK, Holland, Denmark and Sweden for the next two years, before Mick and Mac finally left.. there was a new project in the offing.

SALT, featuring singer / harp player Stevie Smith, was formed in 1974, and was a big hit on the London club scene and the college scene nationwide. The band proceeded to wear out five drummers and backed up visiting American blues acts such as Big John Wrencher and Cousin Joe, building a strong following and playing London's Marquee Club many times to packed houses. They also opened for the great Muddy Waters at his major "New Victoria" London concert in 1977. In the same year the band played at the Reading Festival, a dream realised.

In 1978 Lou Martin and Rod De'Ath, both ex Killing Floor members, were touring the world with the Rory Gallagher Band. When they left Rory's band after a seven year stint they formed up with Mac, Stevie and Mick to create "Ramrod", a powerful five piece blues rock band which made an instant impact on the British club circuit. The band also toured Ireland and played another date with Muddy Waters, this time at the famous "Rainbow Theatre" in London. However in England it was time for Punk and New Wave, and the band failed to secure the major record deal which they deserved. Mick left to live for a year in the U.S. and Mac returned to his native Presteigne.

Over the following years Mac played with various local bands and worked on recording projects with his wife Jan. In the year 2002 came the call that he was waiting for... the new album by KILLING FLOOR. The band hit the road again with new concerts across Europe.

After that, Mac continued to work with Herefordshire based blues rock trio The Troy Redfern Band, and also the Sultana Brothers. In 2025 he contracted a lung infection and passed away at Hereford Hospital on August 4th. His funeral and 'celebration of life' took place on August 19th at Presteigne Memorial Hall, scene of earlier concerts by Killing Floor and SALT, well attended by his many friends and colleagues.