What did apartheid change?
It didn't change anything as blacks and whites were not living with each other before it was introduced. It was introduced to ensure that the two races stayed apart. The ending of apartheid however saw a massive change in that blacks could suddenly vote and as they were the majority of the population, their party is the one that now runs the country.
Nelson Mandela helped change the racial laws that governed South Africa. This was called apartheid, which rendered blacks as second class citizens. Along with F.W. De Klerk, the A.N.C, and other civic leaders, Mandela was instrumental in helping end apartheid. He also helped form a new multi-ethnic and democratic government in South Africa.