Over at Macworld, TidBITS editor Glenn Fleishman explains Apple’s curious statement that GPS positioning would take minutes without its secret sauce of Wi-Fi network and cell-tower location data. Apple (and other mobile device makers) supplement GPS with several clever techniques to get a faster fix. follow link
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Disabling Dock Space-Making Feature
Having a hard time dragging a file into a folder in the Dock without the Dock trying to make room for it? Holding down Command while dragging the item temporarily disables this Dock feature.
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How the iPhone Supplements GPS