Over at Macworld, Lex Friedman explains how to turn on and use two-factor authentication with a Google account to combine a fixed password with a constantly updated additional code sent as a text message or accessible from a smartphone app. Be aware that two-factor authentication may be more trouble than it’s worth, depending on how often you need to sign into your Google account. follow link
Dragging between Spaces
Juggling various applications within multiple Spaces? If you drag an application window to the edge of your screen and pause for a moment, Mac OS X will move the window into the space that lives in that direction.
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Enable Google’s Two-Factor Login