i made a software update from OSX 10.5 to 10.6 -> not the reason, the failure occur again.i change the ram-modules -> not the reason, the failure occur again.Things i have done in the past to locate the failure: But because the system also hangs up when "no" program is open and the system is in idle i wouldn't look for a reason in this programs. The Programs i used every day are: Firefox, Creative Suite CS5 (Photoshop, Indesign, etc.), Aperture, iWork, iLife. So i think there is no reason for an software-failure. I have try to wait when the failure occur - but after seven hours the results are the same: nothing reacts.Īt the moment i have installed OS X 10.8.2 - in the past OS X 10.5.8 and 10.6.8 on the same machine - the symptoms are the same. After the manually restart the system appears to work fine. Then the only option is to press the power-button 5 seconds an shut the mac down. When i listen to music, then this sound hangs up also. When the failure happens, it seams that the display its repeating to send the last picture (it hangs) an the mac isn't reacting on commands from keyboard or mouse. The iMac is becoming very hot on the upper left back. Sometimes (1-2x/day) the iMac hangs up when i work with my iMac, sometimes he hangs up when the device is in idle (the mac is on but i do nothing on it). My iMac 24" from early 2009 hangs up all the time but without an indicated pattern.
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