I still have this issue on 1.7.4 (also tried 1.7.2 and 1.6.4 without success) at Mavericks (10.9.1) and with Java 1.6.0. I have a portuguese keyboard.
I followed @Alexander Strelets steps to make a fixed version, but it didn't even appear on my profile.
I did notice a slight difference when upgrading from 1.6.4 to 1.7.4 because on 1.7.4 the letter ç, æ and å work. However I can't write any letters with acute and grave accents ( ´ ` ), circumflex (^) and tilde (~).
There is also something that always occurred with me, even on the old launcher: The command key doesn't work, I usually have to use Ctrl as a substitute. I always found it weird, but as I never had any problems writing accentuated letters I din't thought It was relevant but now it might help you to know what's wrong.
Is anyone experiencing the same problem? Thank you!
I still have this issue in OSX Mavericks 10.9.1, Minecraft version 1.7.4, launcher 1.3.10. My Keyboard layout is portuguese and my mac is a macbook pro 13'' early 2011.
Accented letters – á à é è í ì ó ò ú ù â ê î ô û ã õ – don't work when written from the keyboard. They do appear correctly when pasting them.
Thanks for fixing this out!