how to upgrade from darwin os to a later version os
Good Day
I have bought a second hand Mac Pro 2012.........The mac still has darwin OS on and i have tried everything to upgrade the software but nothing is helping what so ever. This includes looking for the the setting that i can download from "anywhere" setting which is not available, I have also downloaded a later version OS from my windows pc but when i want to install it says " javascrpt error ". i Have also tried to reset the mac to its factory setting, but no luck there either. i need help please on what to do and how to do it please.
Mac Pro, Mac OS X (10.5.8), Kernel is Darwin 9.8.0