Macos – Right click using keyboard in Mac OS X

For 10.6 Snow Leopard, one can easily add a Service using Automator, and then assign any keyboard shortcut using System Preferences. See Fast User Switching/Apple Menu? for details.

Right Click via Keyboard

• Activate “Mouse Keys” (in System Preferences, search for “mouse keys”, turn it on).
• Position the mouse cursor.
• Hold Control.
• Press and release the keypad's 5 key.
• Release Control.

Spell Check via Keyboard

There are standard shortcuts for the built-in spell checking. Not all applications may have these menu items.

• ⌘; — Edit > Spelling > Check Spelling
  • This selects the next ‘misspelled’ word.
• ⌘: — Edit > Spelling > Spelling…
  • This selects the next ‘misspelled’ word and opens the Spelling floating window.
  • To focus the floating window without using the mouse, you can use the “full keyboard access” shortcuts (enable them in System Preferences, search for “full keyboard access”, it (and the extra shortcuts it enables) are under the “Keyboard Navigation” subtree.
    • You may need to reassign the shortcuts.
    • The default for “move focus to the floating window” is ⌃F6, but that seems to be used by the editor here on SO, so I needed to change it to test it while composing this answer (I used ⌥F6).
    • Once focus is on the Spelling floating window, you can
      • dismiss it with Escape, or
      • use Tab to move to the various controls, and
      • with the replacement textbox focused, you can
        • use Up and Down to select replacements, and
        • type a replacement, and
        • use Return to activate the default button: Correct