回答“replacing X7900 to T9300 for macOS Sierra install Is it worth it?”Thanks nandor690 for the detailed info on the update. I followed your instruction and upgraded my iMac mid2007 with a T9500 and new wifi/bluetooth module. Everything works beautifully except that the "About This Mac" doesn't show the correct processor frequency. I saw that you mention of adding the FakeSMC.kext sensor kext into /Library/Extensions and then rebuilt the cache with kext utility to show a correct idle speed of the CPU. Please kindly enlighten us on how to do that.