How to do a clean install of OS X Yosemite.

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Apple don’t have instructions for how to do a clean installation of OS X Yosemite, but it is exactly the same as the previous version of OS X  – Mavericks. So if you want a clean fresh installation of Yosemite, just follow Apple’s instructions here of Mavericks”

A clean install deletes ALL your data and resets your computer back to what it was when it was new.   If you are selling your computer this is a good idea. Make sure you copy your data across to your new computer first. (With time machine or migration assistant or both.)



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