MBP freez at startup on the apple logo
I want to start with the core 64-bit, so I followed the instructions listed here:
http://support.apple.com/kb/HT3773?viewlocale=fr_FR
I applied the second method (the code in terminal):
sudo-systemsetup setkernelbootarchitecture x86_64
I restart my MBP (i5, 8GB RAM ..), and here he is freez on apple logo (startup)!!!
I tried all solution but I still have the same problem
It still freezes on the apple logo (with a Gray progress bar appears under Apple logo for maybe 1min).
I'm not sure that this problem is because changing to 64-bits (because i did this several times without any problem with a small software)
i try all the solutions :
- Resseting PRAM and NVRAM
- Resetting the EFI
- i can't startup with SafeMode
Can anyone help me please?
Thanks
sorry for my english
MacBook Pro i5, 15-inch: 2.53GHz, Mac OS X (10.6.5)