Enable booting from USB in legacy mode by accessing the BIOS/UEFI settings and selecting the appropriate boot option.

F5F Stay Refreshed Software Operating Systems Enable booting from USB in legacy mode by accessing the BIOS/UEFI settings and selecting the appropriate boot option.

Gabokazu
Posting Freak

814

01-19-2016, 10:26 AM

You can try installing it in legacy mode, but the newest BIOS files don’t support UEFI Boot. Check if your Dell Optiplex 780 has an older BIOS version that allows legacy booting.

Gabokazu

01-19-2016, 10:26 AM #1

You can try installing it in legacy mode, but the newest BIOS files don’t support UEFI Boot. Check if your Dell Optiplex 780 has an older BIOS version that allows legacy booting.

simooom
Member

01-25-2016, 12:49 AM

Steam OS does not officially support Legacy boot mode.

simooom

01-25-2016, 12:49 AM #2

Steam OS does not officially support Legacy boot mode.

Kisakiroi
Member

01-25-2016, 01:44 AM

I don't agree, I was thinking about whether there might be an alternative solution.

Kisakiroi

01-25-2016, 01:44 AM #3

I don't agree, I was thinking about whether there might be an alternative solution.

h0psin
Junior Member

01-29-2016, 11:36 PM

Consider exploring this option. If Steam enables Legacy Mode, prepare a bootable USB using a Master Boot Record format rather than a GUID Partition Table.

h0psin

01-29-2016, 11:36 PM #4

Consider exploring this option. If Steam enables Legacy Mode, prepare a bootable USB using a Master Boot Record format rather than a GUID Partition Table.

Wild_Stalker
Junior Member

01-30-2016, 01:44 AM

I considered using Rufus to make a Windows startup disk and then launching Setup from there.

Wild_Stalker

01-30-2016, 01:44 AM #5

I considered using Rufus to make a Windows startup disk and then launching Setup from there.

Madsb227
Junior Member

02-04-2016, 10:28 PM

Steam OS can work with both UEFI and Legacy modes provided you're using the latest Brewmaster release. Steam OS has always included Legacy support, and Valve adapted UEFI functionality by porting it from a modified Debian fork after moving from Debian 7 to Debian 8 as their foundation. The official guidelines recommend UEFI BIOS (preferred), so you should obtain the ISO from the provided link. Since Steam OS is built on Kernel 3.18LTS, running new hardware greatly reduces the likelihood of compatibility. It's generally easier to install Ubuntu and then launch Steam in a separate environment for optimal results.

Madsb227

02-04-2016, 10:28 PM #6