I've had Maverick since it was released with no problems, accidentally changed the date earlier from 2013 to 1993, obviously couldn't access many programs as they need the proper date to work, but when I went back onto the Date and Time to change it back and lock it... System Preference came up with 'loading date and time' on the top, and the application was not responding so I had to force quit... I tried restarting, tried it in safe mode on both my account and guest account, I've gone into Library and deleted various system pref files which I read from another similar thread, still doesn't work, I went into Disk Utilities and repaired the disk and repaired the disk permissions, I've viewed hidden files to make sure there wasn't any applications with 0 infront as I seen in another thread that it could be a problem, while looking through PreferencePanes I found the Date and Time Pane which opens but im not able to actually change the date or time and 'set automatically' is faded, and now I've noticed there is another 'date and time' icon in the System Preferences (with the actual System Pref Icon image).... this is annoying as I cant get on any brower, I cant go into the App Store, I cant get on anything as most things need the proper date to work. When I click on System Preferences myself.. some Icons work like the Desktop/Screensaver, General, Languages, Bluetooth etc.... but Date and Time wont work, just says loading all the time, Printers and Scanners just says loading aswell, but obviously its the DATE I need changed but it just isn't letting me and im not sure what else to do.. any help would be appreciated as this is my work computer and haven't been able to do any today so its really important I get this computer back up and sorted and im trying not to do a full restore as I have years of work on it, again, any suggestions would be appreciated and its driving me insane! Update: I also went onto Utilities and Console and there are 4000 messages, mostly 'error parsing stored record', other 2 being 'syncdefaultsd: NSURLconnect/CFURLConnection HTTP load failed......' and '**** globally delayed apps from syncing, next sync.......' just over and over and over again, not sure if this is anything to do with it though? and I've managed to get onto Safari (Google Chrome wouldn't let me on) and I've gone onto the Apple Website and clicked upgrade now for Mavericks to try and reinstall it but it takes me to the App Store, which aint working due to this whole date/system pref issue! DONE IT!!! went into Terminal, used the sudo date command.. sudo date 110816472013 and it worked date and time is now correct, App Store is working, and System Preferences is now working!