The Option key is a modifier key present on Apple keyboards.It is located between the Control key and Command key on a typical Mac keyboard. There are two Option keys on modern (as of 2020) Mac desktop and notebook keyboards, one on each side of the space bar.

Quit any Mac program. Command-Q: If you’re coming from a Windows computer, you might have.
To activate multiple layers using your keyboard, press Shift Alt (Mac: Shift Option ) to activate the layer below the currently selected layer (or the key to activate the layer above). You can keep adding to the selection one layer at a time by tapping on either of the bracket keys while holding down Shift and Alt (Mac: Option).
With Ukelele you can remap Option+key and Shift+Option+key to anything you like including Unicode emoji characters. Here is an example of assigning ⌘ to the Option+c combination: You can pick the required character for mapping using the built-in Characters app as explained in other answers.
Disable Lion/Mountain Lion's Pop-up Accent Window. For people like me who write a lot of foreign.

Alt key on Mac is indeed exist. And it’s called Option key.

Option Command R Mac

Windows vs Mac—there are so many differences. A lot of our customers have used a PC before and then decide they want to switch to Mac for better performance, nicer design, or for better security. However, they were afraid they would have a hard time getting used to the macOS keyboard. We hear questions like, “How can I close a Window? The Mac keyboard doesn’t have the Alt + F4 shortcut.” We always give them two answers:

1. With Parallels Desktop for Mac you have the choice to use the same keyboard shortcuts you had on your PC.

2. If you want to use the Mac keyboard you will experience that the alt key is very different, as we explain in this blog post.

Where is the Alt key on a Mac keyboard?

Option Command R Mac Os

The PC-keyboard equivalent of Alt on a Mac is called the Option key, and you’ll find the Option Key on your Mac if you go two keys to the left of the spacebar. However, the option key on a Mac keyboard is used in a different way than the alt key on a Windows PC. In terms of functionality, the alt key in Windows is often more comparable with the Command key than with the Option key on a Mac. You might be also familiar with the Ctrl and Alt keys from your PC. On your Mac keyboard, you have Command (⌘ cmd), Control (ctrl), and Option (⌥ alt) keys.

How do Windows shortcuts change on a Mac?

Check out some equivalents of popular Windows alt shortcuts on a Mac, which might be especially helpful for those users who are new to Mac:

Command Option A Mac

Windows	Mac
Closing a window	Alt-F4	Command-W
Restarting	Control-Alt-Delete	Control-Command-Eject
Shutting down	Control-Alt-Delete	Control-Option-Command-Eject
Logging out	Control-Alt-Delete	Shift-Command-Q
Switch between open apps	Alt + Tab	Command-tab
Go back	Alt + Left arrow	Command + Left arrow
Go forward	Alt + Right arrow	Command + Right arrow
Move up one screen	Alt + Page Up	Command + Page Up
Move down one screen	Alt + Page Down	Command + Page Down

When running Windows on a Mac with Parallels Desktop, is it possible to use Windows shortcuts on a Mac?

If you run Windows on your Mac with Parallels Desktop for Mac, you can configure your keyboard shortcuts the way you want to work, with either macOS or Windows shortcuts. Click here for more information on how to set the different shortcuts.

Option Command A For Mac Os

You can find even more useful Mac shortcuts in the infographic here.

Option Command Mac Keyboard

Missing your Start Menu and familiar Windows look and feel? You can use Parallels Desktop and have Windows 10 along with your favorite Windows apps on your new Mac.