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Taz Mangus

macrumors 604
Mar 10, 2011
7,815
3,504
Do I have to install another Yosemite onto the 50gb partition before I update or can I just update directly to the new partition?

You first install 10.10.2 to the newly created partition and then apply 10.10.3 update on top of 10.10.2.
 
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