Hi all, I'm looking to order a new BTO iMac in the next week or so. My existing iMac is a late 2009 27" running 10.9.5 Obviously the new iMac will come with Yosemite fully installed which means I'll have to transition from Mavericks. So... a couple of important questions... 1) - before updating would it be wiser to update my existing system to Yosemite rather then risk migrating my data & then updating it on the new system? 2) - I still use iPhoto '09 (8.1) as I personally think the latest versions of iPhoto are non-intuitive, feature reduced, iOS-style eye-candy but... I will have no choice but to update iPhoto as '09 isn't supported by Yosemite. Again... would I be better to update my app & library on my present machine before migrating? I will of course be keeping a full clone of my existing system for the short term so if anything goes pear-shaped it won't be lost but just want to make this as hassle-free as is possible. Thanks in advance.