Mac US Keyboard Dead Keys (typed before base character)
-------------------------

Option/alt-n = tilde 
Option/alt-` = grave 
Option/alt-e = acute 
Option/alt-u = diaeresis/umlaut
Option/alt-i = circumflex
(Option/alt-c = c-cedilla)

ß is Option/alt + b.
å is Option/alt + a.
ø is Option/alt + o.
æ is Option/alt + '.
œ is Option/alt + q.
¡ is Option/alt + 1
¿ is Opton/alt + Shift + /
€ is Option/alt + Shift + 2 

Note:  These should work with all apps.


Mac US Extended Keyboard Dead Keys (typed before base character)
------------------------------
Option/alt-` = grave
Option/alt-^ = circumflex above
Option/alt-w = dot above
Option/alt-e = acute
Option/alt-u = diaeresis/umlaut
Option/alt-i = horn
Option/alt-p = comma below
Option/alt-a = macron above
Option/alt-h = macron below
Option/alt-j = double acute
Option/alt-k = ring above
Option/alt-l = stroke overlay
Option/alt-z = hook above
Option/alt-x = dot below
Option/alt-c = cedilla
Option/alt-v = caron
Option/alt-b = breve
Option/alt-n = tilde above
Option/alt-m = ogonek
Option/alt-Shift-g = circumflex below
Option/alt-Shift-f = tilde below
Option/alt-Shift-s = inverted breve above
Option/alt-Shift-y = double grave above

Note:  This keyboard can only be used with Unicode-savvy apps (not Appleworks or WordX).

Mac US Extended Keyboard Combining Diacritics (typed after base character)
-------------------------------------------------------------------------------

Option/alt-Shift-` = grave
Option/alt-Shift-^ = circumflex
Option/alt-Shift-w = dot above
Option/alt-Shift-e = acute
Option/alt-Shift-u = diaeresis/umlaut
Option/alt-Shift-i = horn
Option/alt-Shift-p = comma below
Option/alt-Shift-a = macron above
Option/alt-Shift-h = macron below
Option/alt-Shift-j = double acute
Option/alt-Shift-k = ring above
Option/alt-Shift-l = stroke overlay
Option/alt-Shift-z = hook
Option/alt-Shift-x = dot below
Option/alt-Shift-c = cedilla
Option/alt-Shift-v = caron
Option/alt-Shift-b = breve
Option/alt-Shift-n = tilde
Option/alt-Shift-m = ogonek

Note:  This keyboard can only be used with Unicode-savvy apps (not Appleworks or WordX).


USIntl Keyboard Dead Keys (typed before base character)
-------------------------------------------------

` = grave
~ = tilde
^ = circumflex
' = acute and c-cedilla
" = diaeresis/umlaut

Note:  This is  the Windows style US International keyboard.  A
rudimentary version can be obtained here
and a more complete one here.  It should be
installed in the folder Library/Keyboard Layouts, either the main one
or the one in your User folder.  

For more info on keyboard issues,
see  this
page.