Hi, I'd like some advice please on the best steps I can take to get past a dilemma with iPhoto performance vs photo management. I am running a 2009 Macbook white on OSX 10.9.5, with 2 GHz Intel Core 2 Duo, 2GB memory, and 120GB storage (with 71GB taken by photos, the rest by music). I have over 10,000 photos stored on this notebook using iPhoto. I noticed that iPhoto performance became significantly worse once I got past about the 7,000 mark. I've read that it is not capable of managing large libraries. On top of that my notebook disk is FULL. General performance of the notebook has also deteriorated in recent years - a combination of OS updates and decreasing storage, I think. I daren't upgrade to Yosemite. Here are my questions: 1) If I were to upgrade to Yosemite would Photos be able to handle a 10,000 picture library better than iPhoto can? I guess my storage issue/processing power would still be a problem though - if I were to store my photo library externally can I still use Photos or does that require the photos to be stored locally? 2) If I were to upgrade to a new Macbook with more storage and processing power would Photos be able to handle a growing photo library of over 10,000? Does Photos lock in your photos in the same way iPhoto did? 3) If I were to extract photos from my iPhoto library and store them externally what software would be recommended? I'd like something that displays my albums in the way iPhoto does. Does Aperture offer anything similar, or is that just for editing? I am trying to weigh up between these options: 1) Removing my photos to return my notebook to a (hopefully) a useable state, but then what else would I use to view/edit photos? 2) Buying a swanky new Macbook, but will I end up in the same situation with Photos not being able to handle a large library? 3) Or dare I say it - move back to windows - so I can get more storage/processing power but for less money. That said, I am reluctant to do so because I've really got used to not having all the Windows irritations. Advice on both hardware and software much appreciated.