Alternatively, an eventual black takeover by force - with all that would have likely entailed.
(think late period Mugabe, but on steroids - and it could easily have been worse than that)
Seems unlikely given the strength of SADF, and the fact that whites made up a far bigger portion of the population than they ever did in Zimbabwe. It would have resulted in a genocide on the black population if they tried.
Which would likely have led to outside intervention to remove the Apartheid regime.
Though of course its hard to see that ending terribly well either.
