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I'm in the process of adding an SSD into my Mac Mini alongside the already fitted HDD (which currently has the OS). Can I keep the HDD connected to the system while installing the new OS on the SSD?

The reason I asked is because this same task on Windows can sometimes install the boot data into the original drive (HDD in this case) instead.

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Yes you can, Mac os X works like you expect, unlike windows :) The HDD will have no alterations whatsoever when you install a system on the SSD, just make sure note to erase it with diskutility

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From what I've read OS X created a recovery partition also, will this be created on the SSD if one already exists on the HDD? – Imran Apr 27 '13 at 1:18

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