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Hello, thank you for your work! I got Lion 10.7.4 running perfectly on my 6720s. A friend of mine owns a 6720s, too. I installed 10.7.4 on it and used the newest kexts from this thread. Everything works except Graphics. Whenever I replace the native GMAX3100 kext with those from this thread or any other from the internet, the spinning wheel freezes at boot. We definitely both own a 6720. Anyway my LCD is matt and his is glossy. Also, I have a Intel Centrino 1,73GHz Dual Core, while he has a Intel Celeron M 530 1,79GHz Single Core. This makes me imply that there exist different generations of 6720s devices. I attached the ioreg and unmodded DSDT from both notebooks. Could anyone help my to get graphics work? 6720s_lion.zip