Alt refers to the Alt key on a PC, Win to the Windows key (represented by the Super keysyms over the RFB protocol), and Cmd to the Command key on a Mac. Suffixes L and R refer to the left and right variants of keys. Mac laptops have a ‘hidden’ numeric keypad, as discussed in the WebAIM article mentioned above, though due to the extra keystrokes required to access it, this approach is not recommended. Definitions: On this page, a Mac’s Option/Alt key is referred to as Opt. Use the numpad on the Mac laptop keyboard The Windows “Remapkey” tool mentioned in this WebAIM article.The only way I could get Command button functionality to work was to set the cntl key to be that. yeah, the windows button was the first try, but it didn't even work while Lion was booted up. There are a number of utilities that can be used to achieve this, including the following. Try the Windows logo + R or the alt-key, basically try all of the buttons, especially since you've changed the defaults. Use a key remapping program within Windows VirtualBox passes all keys except the Host Key directly to the Virtual Machine, so you would need to use a key remapping program within Windows.If you are running Windows in a Virtual Machine on OS X, the VM application will most likely offer a key-mapping facility. Use your Virtual Machine to map a key (or combination) to INSERT In this case, you have three options, detailed below. If you have a Mac laptop, or non-numeric keyboard If you wish, you can also map other keys (such as the relatively unused F16) to INSERT, too (more details below). Thanks to Hans Hillen for pointing this out. Then the “0” key on the numeric keypad is INSERT in Windows. If you have an Apple keyboard with numeric keypad For example, to use Command-C (copy), press and hold the Command key, then the C key, then release both keys. CAPS LOCK cannot be easily used as a replacement, due to the different (to Windows) way that Mac keyboards handle it. To use a keyboard shortcut, press and hold one or more modifier keys and then press the last key of the shortcut.Mac laptops do not have the INSERT key.You may want to use keystrokes in screen readers such as INSERT+F7 (in NVDA or JAWS) to bring up a list of links on the page, or INSERT+CTRL+ (in JAWS) to bring up a list of ARIA landmark regions. This article collects together and updates advice I have encountered on and off the web to access or map the INSERT key in Windows on a Mac (either in a Virtual Machine or via Boot Camp), which is useful when you are using assistive technologies such as screen readers.