Charles John Macallum, known as Rabbit Mac, is a Hip Hop and Rap based Indian singer from Malaysia who is active in the Malaysian musical industry.

At the beginning of his career and due to his passion for music and curiosity, Rabbit was noticed by some of the leading pubs and bistros as an Emcee and DJ, getting hired to participate in special shows, Hip Hop shows and Gigs in Penang.

Besides his already mentioned success, Rabbit Mac has also featured and worked alongside artists like Bionic Asura, Dhilip Varman, Mista Gee, Mc Phoenix, SatishDPaul, Haze Freaky G, Saran Z, Sugu Amigoz, Mc.Syze, Lock Up, Vassan, Sasi the Don, Nakeeran from Malaysia, Shabir from Singapore, Dinesh Kanagarathnam from Sri Lanka, DJ.Sathya, Christopher Columbus from Singapore, Srik from India, and Charles Bosco from United Kingdoms.

He featured and composed a sound track for India's Jaya TV's “Thuppariyum Pulli”.

PSYCHO.unit and Rabbit Mac have also worked with a big time movie making company known as MIG Metrowealth by doing sound tracks for most anticipated local movies “Senario” and “Ngangkung” which were released end of the year 2009.