Why does my OS X 10.6.8 have various applications hang for several minutes, then resume. This is not a startup problem.

I upgraded to Mac OS X 10.6.8 a few weeks ago. It seemed to be running OK, so we upgraded another system also. Now both machine are, from time to time, stalling whatever application is running. Everything stops or runs veeeeeeerrrrrry slowly for several minutes even including bringing other windows to the front. The disk runs almost like it is swapping a lot. Then the system frees up and runs normally for a while. This is not a startup problem. I occurrs on systems that have been running for a day or two or more. It happens on an iMac and on a MacBookPro. Neither of them had this behavior before the 10.6.8 upgrade.

Jocke27 wrote:
What do you mean with corrupt?
Why did you suggest that I created a new profile?
There are cache files and other system files that are created every time a user account is created.  Sometimes these are corrupted in the OS and it really has no bearing on the specific application but it can lead to erratic behavior.  Creating a new user recreates all these system files and thus it's almost like starting fresh.  It's one step shy of re-installation of an OS.  So because changing the user fixed the issue, then we have eliminated the fact that the application is causing the error and we know the OS is causing the error.
I can't just go in to that profile when I want to use?
I wouldn't recommend it.  This can lead to more problems with the OS down the road with other applications and depending on where the corruption lies it can lead to issues with OS upgrades or even installing new software.  The files that are typically most critical to users are stored in the Applications folder or the Documents/Sites/Pictures folders.  You can easily drag them over to a new user account.  If you have email being backed up for a product like Thunderbird you can also bring over many of the Library items as well.

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