The Option key (often labelled Alt) is found in the middle of the three keys either side of the Space bar; the three keys being from the outside moving towards the Space bar:
Control (ctrl), Option (alt) and Command (cmd)
If you are on a Mac, they should be to the left and right of the space bar. These keys do not exist on a PC, but the Alt key is the equivalent of the Option key. As for the Command key, the Windows key sends the same scan code (they're the same key from the computer's point of view) but they are used for much different purposes.
That would be the "alt" key, on either side of the space bar.
This is the option key on "Mac" keyboards and Alt key on "IBM" clone.
there is no option key
The mod key, or alt key is called the option key on a Mac. It is to the right or left of the command key.
The option key is a modifier key (ALT) present on Apple Keyboard
Hold down the option (alt) key and press the 's' key.
Alt key or Option on Mac.
On a Mac keyboard, press and hold the option key, then type the number 3. Then release the option key. I don't know about on a Windows keyboard
Command-Option-Shift-T is the Mac version of the Windows command Control-Alt-Shift-T. In general the Mac uses the Command key where Windows uses the Control key.
±(on Windows® character map as Keystroke: Alt+0177)On a Mac, press and hold the option key, then shift and +Release the option key.
To turn off the negative effect on your Mac Book Pro (turning the screen black, white, and a few other colors), hold the command key, the alt/option key, and the ctrl key (all three in a row), and then hit the 8 key (the key above the keyboard, not on the number key pad).
You hold down the option key or alt, and click zero, you will then get yourself a degrees symbol like this: º
The same command on a mac would be command key(cmd)+A any ctrl key command is the same as the cmd key on a mac
Holding down the option key while starting up a Mac running Mac OS X enters the Startup Manager which will let you select where you want to boot from.
The Mac's shift key is activated by pressing it down.