Can my Apple ID password be recovered in Keychain Access?
Solution 1:
2020 note: looks like this is not possible anymore, keychain just stores tokens (encrypted version of password)
Solution 2:
Yes. This works with Sierra:
Find the utility Keychain Access ( Applications > Utilities) and launch it. If the lock icon at the upper left of the window is locked, unlock it. Enter "appleid" (no quotes) in the search box at the upper right. Find "appleid" in the resulting list, and double-click it. A small window will appear, with tabbed choices for "Attributes" or "Access Control." Make sure "Attributes" is selected. At the bottom left of the Attributes tab, select the box labeled "Show password." Another dialog will be displayed; enter your computer login, and press "Return." The Apple ID password should then be displayed.