Head to System Preferences and hit the General Preference pane. Unless you’ve done some major moving about, it’s usually located in the top-left.
Turning Resume on or off is a simple case of ticking or unticking the checkbox next to ‘Restore windows when quitting or re-opening apps’.
In Lion, Apple hid the Library folder, making it much harder to accidentally delete vital files. To find it, head to Finder’s Go menu while holding the Alt key.
Once you’re in, tread carefully and head straight down to the Saved Application State folder – this is where Resume’s data on different apps is kept.
Each folder in the Saved Application State folder is named after a different app. Find the folder for the app you’d like to disable the Resume function from.
Once you’re in the folder of the app you’d like to be Resume-less, delete its contents, as that is the data Resume uses to reload its windows.
To stop Resume adding any more data for this app, select its folder, open up its Get Info panel (Command + I) and check the Locked box.
To put a temporary stop to Resume on an app-by- app basis, hold down the Alt key as you quit – this will close windows and ensure they don’t reappear.
Use the terminal command ‘defaults write com. apple.Preview NSQuitAlwaysKeepsWindows -bool false’ to curtail Resume on an app-by-app basis.
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