To register, visit https://www.makro.co.za/my-account/my-business 

How to sign up for a business account?

1. In store 
2. Sales representative
3. Online 'How To' guide
4. Register as a business/convert your profile to a business under 'my profile'
5. Complete the form below to register as a business
6. If you see the blue line (below) at the top of the login page you are already signed up