Can I run the OS install with the keyboard or need to find a USB keyboard during the install of the OS
What OS are you installing on a new mini?
I agree with talmy, you can do it with a Bt keyboard. It is great to have USB devices as backups but I did it with bluetooth only.
You did not mention your mouse or pointing device. What do you plan to use?
When I had a problem during installation I simply switched my pairing order. Instead of connecting the keyboard first I tried the Magic Trackpad and it worked. Then with the trackpad paired, the keyboard connected with no issues.