The OECD estimates that South Africa’s per capita potential growth rate for 2020-2030 is -0.1% (under their baseline projections). They estimate that trend labour efficiency was the main growth engine of real GDP per capita growth during 2000-2007, but is estimated to represent a drag on growth for 2020-2030. Despite South Africa’s relatively weak productivity growth performance, the OECD assumes some modest convergence to US living standards over the next 30 to 40 years. 
Footnote
For a comparison of productivity estimates across different sources, see here. For a comparison of potential growth estimates, see here,
