Apple Wireless Keyboard the initial release. The new model now uses only two AA batteries instead of three originally. Additionally, Mac OS X 10.5.8 is now the minimum OS over the original Mac OS X 10.4.10. This model of keyboard became standard with new generation of iMacs introduced on the same day. On July 20, 2011, following the release of Mac OS X 10.7/OS X Lion, Apple updated the keyboard slightly, updating the label on the Exposé key to Mission Control and changing the Dashboard key to a Launchpad key. Keyboard layouts with a rectangular Enter key are available in American English and
QWERTY or based on the English (US) keyboard. In Windows 8 and later versions, the backslash key (left of Z or space) is duplicated onto the hash key (left of Enter), press which with key to type backslash , with and keys to type vertical bar . This aids users who are familiar with UK keyboard layout while the keyboard lacks this key (e.g. US Standard keyboard and Japan JIS keyboard). The British version of the Apple Keyboard does not use the standard UK layout. Instead, some older versions have the US layout (see below) with a few differences: the sign