MacOS – the Sixth Step of MacBook Repair

crashmacbook promacosrepair

My Macbook has crashed once or twice daily ever since I installed Lion. I am unable to return to Snow Leopard because my Time Machine is now coupled with Lion.

I went through the sequence:

  1. Reset the PRAM: Hold down Command ⌘+Option ⌥+P+R on boot. Release after hearing the computer chime twice. http://support.apple.com/kb/HT1379
  2. Reset the SMC:
    Shutdown. Disconnect power adapter. Remove the battery. Press and hold power for 5 seconds.
    http://support.apple.com/kb/HT3964
  3. Verify/Repair disk
    Reboot into the recovery partition (press Option ⌥ while booting) and run Disk Utility. The disk had two problems, which are now fixed. http://support.apple.com/kb/HT1782
  4. Run the hardware diagnostics:
    Reboot with the original OS X Disk 1 while pressing D. The hardware diagnostics (memory only, apparently) says all is well. http://support.apple.com/kb/HT1509
  5. Reinstall OS X from the recovery partition:
    Hold Command ⌘+R while booting.
    Slight reduction in the rate of crash (but that's only an impression). http://support.apple.com/kb/HT4718

What would you try next?

Edit:
The machine is out of warranty and out of Apple care.

Best Answer

Take it to Apple and ask them to fix it under warranty. If you have made a clean install, and can still demonstrate the problem, you almost certainly have some sort of hardware issue.

If you did a reinstall, then added something that has a kext, that might be responsible, though, so in the (unlikely) event, reinstall, don't install that, and see if that fixes the problem.

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