Hello. I've had my Mac since early July & I have had this problem with it since the beginning. See, after I boot up the computer, all the applications open just fine. Then, after about an hour or so of using the computer, none of the applications want to open up when I click on them any longer. I try opening them in a terminal and I get the 'segmentation fault' error. Ironically enough, none of the Windows programs I use on my Mac via Wine have this problem at all. So, out of frustration, I reboot my system & everything works just fine again for about another hour or so. I have researched this problem on the internet a whole lot in an attempt to fix this myself but with no success whatsoever. And yes, I have tried fixing the permissions for the apps via the Disk Utility, deleting the .pref files, etc. All those things I have tried haven't fixed this problem whatsoever. Can someone in this forum please tell me how to fix this problem? I never had this problem on any computers I have had in the past that had Windows or Linux on them. Why does this problem exist on a Mac? Heck, I'd be willing to even get rid of OS X & put Linux on the computer if it would fix the problem. Please help me!!! ---------- By the way, I have a 27" screen iMac with Snow Leopard on it, 12Gb of RAM, and a 1Tb hard drive. Pretty top of the line, I'd say. I spared no expense in getting this computer.