AutoHotkey script allowing the English International keyboard shortcuts for umlaute (ä, ö, ü) and eszett (ß) on windows

english_international_mac_keyboard_layout_for_windows.ahk

; Alt+S -> ß
!s:: Send ß
return

; Alt+U followed by A -> ä
; Alt+U followed by Shift+A -> Ä
; Alt+U followed by O -> ö
; Alt+U followed by Shift+O -> Ö
; Alt+U followed by U -> ü
; Alt+U followed by Shift+U -> Ü
!u::
Input, key, L1
if (key = "a")
{
    if (GetKeyState("Shift", "P"))
    {
        Send Ä
    }
    else
    {
        Send ä
    }
}
else if (key = "o")
{
    if (GetKeyState("Shift", "P"))
    {
        Send Ö
    }
    else
    {
        Send ö
    }
}
else if (key = "u")
{
    if (GetKeyState("Shift", "P"))
    {
        Send Ü
    }
    else
    {
        Send ü
    }
}
return

Your screenshot with the error message is referring to another script.

I had some additional settings at the top of my script. I removed them and don't get the warning anymore. Thanks!