My brother has given me his 2010 MacBook Pro with a 256GB SSD running 10.9 and I want to do a clean install of OS X 10.10 Yosemite. It is an aftermarket SSD (256GB OCZ Agility 3 SSD Drive) can I do a clean install straight away or do I need to do something else? I will only be using it for documents and web browsing. I have read a few things about this called Trim and I was wondering what it is and if this SSD will work with Yosemite, Do I need to do anything else before performing a clean install? Sorry for the newbie question.