I have a macpro 2.93 8-core for 1 month. Today I put the SMB on in filesharing. After a while I restart the computer and it is not possible anymore to get it restarted. The computer hangs in the grey screen with the apple logo. I tried to startup from the install disc but he does'nt do anything. Also restarting with the c-key does'nt work. restarting with the option key does'nt work, restarting with option, shift, delete, control does'nt work! I took the power of, pressing the videocard, the memory and the blackmagic card, but it doesn't restart! This is the second time in a month that it happends. The first time I also put the SMB sharing on and the computer also hang, but it was possible to restart from CD and did a entire re-install. After that i had no problem until today that i put the SMB sharing on again....I am desperate. What can i do? Is there somebody with a solution?