I recently acquired a Hp compaq dc7800 SFF, and I tried to install several versions of Mac OS, but I am new to this topic so I don't have much knowledge about all the steps and actions, that's why I would like to ask for help to know which version is more recommended for my device and which steps I should take to install it.
The specifications of my device are:
Intel core 2 Duo E8400 3.00GHZ
4GB RAM
120 HDD