Whenever I tried to download postGIS from stack builder, Stack builder is not responding and freeze . I do not know what I should do now. All I want to know if there is any other way to download postGIS .
Even I faced the same problem. So I did this, after clicking on the download postGIS extension in the stack builder GUI, I just left my laptop untouched for a while. I closed all applications and waited for a response on the stack builder GUI. After waiting for 3-5 mins, the stuck GUI worked alright. The download was complete and the installation was successful.