I tried to install windows 7 on my macbook(2009 unibody)using bootcamp before i tried to install it i remembered i don't have the osx cd so i quit. now whenever i try to switch my macbook on theres a black screen which says "no bootable device found" i have to use the option key every time to load the osx. So now my question is how to remove the black screen so i can go on osx instantly.
running OSX Mavericks
running OSX Mavericks
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