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#ACCESSING CONTROL PANEL ON MAC OS 10.12 SIERRA MAC OS X#
#ACCESSING CONTROL PANEL ON MAC OS 10.12 SIERRA INSTALL#

When the Dell logo appears keep pressing F2 until you hear a beep.(If you don’t have an ‘any’ key, just press Return) -) first is a letter ‘oh’ the second is a number ‘zero’) Type in O780-A15.exe and press Return (NB.Select FreeDOS Safe Mode and press Return.Select Default and press Return OR wait for it to time out.Start the Optiplex 780 SFF and press F12 when Dell logo appears.Copy O780-A15.exe to the USB stick (at the top level, not in a folder).Enter your login password, when prompted.If it fails the first time, click Done and do step 4.Erase and format the USB stick for MS-DOS.Insert a spare USB stick in a USB port (IT WILL BE ERASED).

#ACCESSING CONTROL PANEL ON MAC OS 10.12 SIERRA INSTALL#

Download and install unetbootin from here.

Updating the BIOS (only do this if it is less than version A15)

Scroll through each of the BIOS settings pages and take a photo for future reference.

Restart the 780 and when Dell logo appears keep pressing F2 until you hear a beep.

Record BIOS settings (in case you break something later on)

If the number is less than 15, you need to update the BIOS.

Look at the very bottom of the screen for, “BIOS Revision AXX”, where XX is a number.

Restart the 780 and watch the boot screen.

Another USB stick of about 2GB or more.

A camera/phone for taking photos of settings.

A computer with access to the Internet (preferably NOT the Optiplex in case you need to download something halfway through).

Clover Configurator (Vibrant Edition) from.

A Radeon HD5450 Graphics Card (the on-board card is not supposed to work, although it did for me).

A Dell Optiplex 780 SFF (I did say it’s an idiot’s guide).

#ACCESSING CONTROL PANEL ON MAC OS 10.12 SIERRA MAC OS X#

An Idiot’s (My!) Guide to Installing Mac OS X Sierra 10.12.3 on a Dell Optiplex 780 Small Form Factor