Of all that has been written about Steve Jobs, nothing has been as touching as the eulogy his sister, the novelist Mona Simpson, delivered at his memorial service. It’s a rare glimpse of a side of Steve Jobs that very few people ever saw. follow link
Turn Off Filename Extension Warning
In Leopard, Apple fixed an annoying aspect of working with the Finder in Tiger. Previously, if you changed a file's extension, the Finder prompted for confirmation. But since no one has ever accidentally changed a filename extension, Apple thankfully added an option to turn that warning off in the Leopard Finder's preferences. Choose Finder > Preferences, and in the Advanced screen, deselect Show Warning Before Changing an Extension.
Mona Simpson’s Eulogy for Steve Jobs