Get Temperature Monitor to see if it's heat related...
And/or iStat Pro...
If you have any temps in the 70°C/160°F range, that's likely it.
Open console in Applications>Utilities, check the system log for the date/time of the last problem for clues.
New test to check temperature: let the computer cold down for a few hours and turn on after that, the temperature start at 40ºC and quickly increases up to reach 65~67º both cpus and no load, only turned on and idle.
Ok, I will clean my computer and think that could be good idea to replace the thermal paste.
No it was not this, today I clean my computer and replace the thermal paste, the idle temperature decreases from 60º to 41~45º and in heavy (compiling jpge library using make -j4 and gcc -O3) use increases to 57º and crashes again, now let it alone with Mail, adium and uTorrent and about a 45% of load.
The crash report says that thread responsible was Mail, but I don't hesitate that any application could be done the same.
Good to see the lower temps, nice work.
The Memory test can really only be trusted if it finds a problem, not if it doesn't find a problem.
Memtest OS X...
Rember is a freeware GUI for the memtest ...
I looked at the FAQ section of Temperature Monitor and found this temp info:
"G4 processors of type 7455 or later (typically used in Macintosh systems with 867 MHz and above) are designed for a maximum operating temperature of 65 degrees Celsius (149 degrees Fahrenheit), also measured at the chip die of the CPU.
I get readings of more than 90°C (194°F) for the FB-DIM modules in my Mac Pro. Isn't this a bit high?
No, temperatures in that range are normal for FB-DIMMs and are no cause for concern. Each FB-DIMM contains its own controller, called "Advanced Memory Buffer (AMB)". An AMB also contains an internal sensor which measures temperature directly inside the chip. The specified maximum temperature range of an FB-DIMM, measured by the AMB, usually lies in the interval between 95°C and 125°C (203°F .. 257°F). It will vary from manufacturer to manufacturer, a typical value is 110°C (230°F). If you like to know the exact specifications for your FB-DIM modules, note the part number and manufacturer of the respective modules (printed on the label of each module), and download the data sheets for those parts from the manufacturer. Nearly all chip manufacturers and RAM vendors publish the specifications at their web sites."
External USB and Firewire device can cause Kernal Panics. What external devices do you have connected?
Have you run Disk Utility - repair permissions and repair hard drive?
Yes I ran Disk Utility and no troubles with both disks. The only usb devices that are always connected to the computer are a mouse and keyboard, sometimes an external hard drive and my iPod.
I'm still testing my computer from last crash, and for a while it's stable, I think that Mail could be the problem, is not running now and there are not crashes....
Not certain, but this can fix myriad Mail problems...
Safe Boot from the HD, (holding Shift key down at bootup), it will try to repair your Disk Directory while the spinning radian is happening, so let it go, run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, then move this folder & file to the Desktop.
Move this Folder to the Desktop...
Move this file to the Desktop...
If that doesn't do it and you can afford to redo all your Rules, try these & reboot...
Note, in 10.5 & up /Users/YourUserName/Library/Caches/Mail/ may or may not exist.