Q: My Mac Pro tower quad core crashed and is showing a NO sign (the circle with a slash through it). How do I safely get it to come b ... more
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Aug 13, 2013 11:37 AMby The hatter,HelpfulGeneral purpose Mac troubleshooting guide:
Creating a temporary user to isolate user-specific problems:
Isolating an issue by using another user account
Identifying resource hogs and other tips:
Using Activity Monitor to read System Memory and determine how much RAM is being used
Starting the computer in "safe mode":
Mac OS X: What is Safe Boot, Safe Mode?
To identify potential hardware problems:
General Mac maintenance:
Troubleshooting: My computer won't turn onhttps://support.apple.com/kb/TS1367
Where are your bootable backups and clones stored?
What do you have to boot from to restore or attempt to recovery files that are not backed up?
It won't be a PowerMac. People tend to think they look alike? or mean the same thing.
http://www.everymac.com/systems/apple/mac_pro/specs/mac-pro-quad-2.66-specs.html
Try zap PRAM and SMC Reset. If you have ATI 5770 which many have upgraded to you won't be able to use older DVD or systems than 10.6.5
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Aug 15, 2013 12:41 PMby Johnb-one,Helpfulsorry to hear that. did you try Data Rescue 3?. I don't work for them or for Apple, but I had good results with that before, and I had the same kinda problem you did. Boot drive wouldn't mount, thought I was going to have to send it in and pay $$$. I did however, have to buy a hard drive to backup to, and make sure at least Leopard was on there
good luck
JB
