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Installing OS X 10.10 Developer Preview: Will all current information be deleted?
The laptop is running OS X 10.9.3, if you run the OS X 10.10 installation on this laptop, will it install a clean system, or just update the current one?
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In general, I took a chance and bet. The system was just updated, no data was lost!
I have already updated two beech, without much adventure. The only problem is, Tunnelblick does not want to start under 10.10, but it is capricious in life.
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