For the past year I have been plagued by some process periodically deleting the folder /private/var/folders/g3/gm1shdzs1wsff1phr823tp0c0000gs/T Lately this happens every day. I have at least 20 different applications that store temporary data there, and when the folder is removed, those applications choke in various ways. For example, my checkbook application is unable to save changes made during a session; Appigo Todo sends me error messages of a corrupted file. I can fix the folder "T" by rebooting, but by then the damage has already been done. Besides, who wants to constantly have to monitor an invisible folder? Sometimes the folder disappears when I am not even touching the keyboard which makes me suspect an application working in the background but I can't be sure of that. I am using Mountain Lion but I believe I had this problem back in Lion, also. 1. Does anyone have any idea of an application or a process that might do this? 2. Failing that, does anyone have an idea how I might either stop or, better, track down whatever is doing this? For example, is there some folder action I could put on the folder gm1shdzs1wsff1phr823tp0c0000gs that would tell me what process is deleting its subfolder "T"? Or could I change permissions on gm1shdzs1wsff1phr823tp0c0000gs so that apps could read-write-delete their data within folder T but not be able to delete T itself? If there is something like this that I can do, would I have to re-do it every time I reboot?