At first, "yum" downloads all the RPM package header files from the designated cAos repository. After gathering these it examines them and determines whether it needs to add any other packages to the pile it must download to satisfy dependencies when installing the base system.
When "yum" is satisfied that it knows what packages to download it begins downloading the RPM software package files. This will take a while, depending on the speed of your internet connection.
After all RPMs have been downloaded they will be installed. This will take a while, but is dependent on the speed of the install computer's hardware (processor, bus, disks).
The last few lines displayed on this screen will be:
System has been installed... Press [ENTER] to continue...
so press the enter key to move on.