I once had the same problem with an old Macbook Air and stubbornly used Ukulele to create a keyboard layout that let me chord around four dead keys with alt and

I once had the same problem with an old Macbook Air and stubbornly used Ukulele to create a keyboard layout that let me chord around four dead keys with alt and the key directly below. It's not a long term solution, but it might help in a pinch.