Before moving on to installing the OS, let's take care of updating the BIOS.
Gigabyte publishes (quite often) updated BIOS with new features and fixes.
So let's download and unpack the new BIOS.
At the time of the download, the latest was version F9.
OK, so here I have my motherboard_bios_ga-p55m-ud4_f9.exe file...
But, how am I going to execute the .exe in my Mac or my Linux PC ?
Easy... I won't !
The BIOS file is a self-extracting 7zip compressed file.
So I can use keka, Stuffit Expander, or 7za on my Mac OS X (or p7zip on my Debian Linux PC) to unpack it.
Once open, I find the p55mud4.f9 there...
Time to move on to Updating the BIOS