I try with this code
MCG -> C1 = 0x2AU;
MCG -> C2 = 0x20U;
MCG -> C4 = 0x00U;
MCG -> C5 = 0x09U;
MCG -> C6 = 0x58U;
MCG -> SC = 0x00U;
OSC -> CR = 0x80;
SIM -> SOPT1 = 0x000C0000UL;
SIM -> SOPT2 = 0x00010000UL;
SIM -> CLKDIV1 = 0x01140000UL;
but when i am debugging, after SystemCoreClockUpdate(), i get SystemCoreClock = 192 000 000
OK, Finally it's working!!!
You have to replace the file system_MK64F12.c to the newer version and add system_MK64F12.h to the project.
YOU DON'T HAVE TO REPLACE startup_MK64F12.s!!!