Macs do not use a BIOS so there is no key to press.
you press Command + left arrow key
The Mac does not have a BIOS to enter. The equivalent would be the Extensible Firmware Interface (EFI) to access this (which is traditionally referred to as Open Firmware hence the O and F key combination) press Command-Option-O-F keys during startup. If you did not know this then you may want to read up around the subject before starting to mess with your Mac.
A Mac's "BIOS" is not really a BIOS. It is OpenFirmware, which many Mac users find to be better than BIOS. To access OpenFirmware, you must use two hands on the keyboard and the key combination CMD-OPT-O-F.
Hold down the "control" key and click
The Mac does not have a BIOS and so the settings cannot be checked.
Windows uses BIOS while MAC uses EFI
On a Mac, the F1 key decreases brightness, unless your Mac is set to do otherwise. Decrease brightness is the default. To increase brightness, press the F2 key.
To type at on a Mac is a two step operation: 1: press the A key 2: press the T key If the symbol @ is required it is usually found by pressing the Shift and 2 keys.
the backspace button or on a mac its delete
press the '1' key, and then select a slot press '0' to load
Hold down the option (alt) key and press the 's' key.
Press the Apple key and hold it,then press the plus sighn right next to the backspace or delete button.