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the8thark

 
Member Since: Jan 27, 2007
Location: *Brisvegas*
Posts: 5,658
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Mac Specs: 17 inch 2 GHz C2D imac (5,1) with 3GB DDR2 RAM, X1600 (128MB memory) GPU - OSX 10.6.3

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Actually OS X has the 3 installation options.

1. Clean install - Wipe your HD and install the new OS fresh.
2. Archive and Install - Puts about 95% of your data into a folder and installs your new OS fresh. Like the above but it keeps your data. But not your system preferences.
3. Standard Install (I forget the name but that's close enough). That over-writes your system data with the new OS data. And leaves everything, preferences included exactly as they were before the installation.

Personally I just use option 3. I've never had any problems in the past. But if you want to make a system/HD backup for be extra safe and extra sure then it's not a bad idea.
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