i cannot open my macbook pro after updating to 10.9
i tried many processes recorvery(Op+COM+R) or (COM+R) or (OPTION) , but still not work, and the " Applications/.../.../ operation not permitted
I tried to make a usb installer but i can instal it no matter the revcovery or opening the computer with C.
Besides, i cannot open the safe mode.
please give me some suggestion about solving this problem.
Thanks a lot!🙂😢