From Pretoria:

Take the N4 Highway to Rustenburg (=Platinum Highway).
Just after Rustenburg, take the R565 Sun City Phokeng get off.
At the stop, turn right towards Sun City R565.
At the next stop, go straight.
Once you see the get off for Phokeng/Morgenzon, carry on on the highway for 3 km and take the next exit on your left (=exit onto a sand road).
Take the sand road on the left and drive for 1km on the sand road until the T-junction. Turn left, drive for 400m and here we are…
From Johannesburg:

Option 1: Take the N1 to Pretoria and follow the directions as if you were coming from Pretoria.

Option 2: From Sandton/Fourways : Take the R511 to Brits/Hartebeestpoort Dam. As soon as you can, take the N4 highway towards Rustenburg. Follow the directions as if you were coming from Pretoria.

Option 3: From Bryanston/Randburg : Take the R512 to Brits/Hartebeestpoort Dam. As soon as you can, take the N4 highway towards Rustenburg. Follow the directions as if you were coming from Pretoria.

Option 4:From Randburg. Take the R24 to Rustenburg. As you arrive to Rustenburg, take the N4 highway towards Swartruggens. Just after Rustenburg, take the R565 Sun City Phokeng get off.
At the stop, turn right towards Sun City R565.
At the next stop, go straight.
Once you see the get off for Phokeng/Morgenzon, carry on on the highway for 3 km and take the next exit on your left (=exit onto a sand road).
Take the sand road on the left and drive for 1km on the sand road until the T-junction. Turn left, drive for 400m and here we are…

From Sun City:

As you get out of Sun City, turn right.
At the next junction, turn left into the R565, in direction of Rustenburg.
When you reach Boeschoek, drive for 7 more km. 100m until the circle. At the circle, turn right in directions of Rustenburg, take the 3rd small exit on your right handside (3km after the circle).
Take the sand road on the left and drive for 1km on the sand road until the T-junction. Turn left, drive for 400m and here we are…
From Johannesburg internation airport:

Take the R21 to Pretoria.
Take the N1 to Pretoria East (=Pretoria Oos in Afrikaans).
Take the N4 Highway to Rustenburg (=Platinum Highway).
Just after Rustenburg, take the R565 Sun City Phokeng get off.
At the stop, turn right towards Sun City R565.
At the next stop, go straight.
Once you see the get off for Phokeng/Morgenzon, carry on on the highway for 3 km and take the next exit on your left (=exit onto a sand road).
Take the sand road on the left and drive for 1km on the sand road until the T-junction. Turn left, drive for 400m and here we are…
Most common GPS position:

25 34 611S
27 07 135E

For some reasons, some GPS indicate the following positions : 25 34 611S 27 07 129E (or more rarely 25 34 585S 27 07 135E).

The physical address is Plot 73 Boekenhoutfontein 0301. In any case, please check the good old writtendirections as you get closer to the place to make sure that the GPS sends you in the right direction.