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Message: <blockquote data-quote="witchylisa" data-source="post: 1606536" data-attributes="member: 333596">Hi, I have a 20-inch 2008 iMac and a 13 inch MacBook 2008 and an iPhone 5. I just installed Mavericks on my iMac in order to be able to buy Pages (App wouldnt download with my previous os) I've just tried to open iphoto for the first time since installing Mavericks and get this message "The photo library needs to be upgraded to work with this version of iPhoto. Your photo library will not be readable by previous versions of iPhoto after the upgrade.' What does that mean? (I stupidly didnt save the photos externally before upgrading to Mavericks) Also, is it going to matter that my laptop is not running Mavericks (cant install it- not enough room on disc to install apparently) Laptop is OS X Lion 10.7.5. I dont really understand how photo streaming or iCloud works between 2 devices. So my question is- Will it matter that my devices do not have the same OS?I want to be sure that I wont lose access to the photos on either device  because of some kind of conflict. Should I upgrade the iPhoto programme on the iMac in my particular situation.</blockquote>

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