What was immigration like to South Africa during apartheid?

During apartheid, Immigration to South Africa was heavily regulated and influenced by the country's racial policies. The government favored immigration from certain countries, particularly those with predominantly white populations, while restricting entry from nations with significant Black or non-white populations. This led to a demographic imbalance and reinforced the existing racial hierarchy. Additionally, political refugees, especially from neighboring countries facing oppression, often sought asylum in South Africa, challenging the apartheid regime's strict immigration controls.