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.
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The long-standing prohibition against Time Machine backing up to a USB hard drive attached to an AirPort Extreme Base Station has quietly disappeared with the 802.11ac model released in June 2013. So quietly, in fact, that Apple hasn’t even updated a support document warning that such a setup isn’t supported.
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Air Display 2 lets you use your iPad, iPhone, or nearby Mac as
extra screen real estate for your main computer. Now smarter,
better, and 50 percent faster than ever. <http://avatron.com/tidbits>