I use Macbook bought in Jan 2011 now running updated Snow Leopard.Now, Im considering upgrading to Mountain Lion.I have a few questions on that. - I have software like Adobe Photoshop on my Macbook, if I upgrade are they safe and can be used as usual on Mountain Lion. - If in future for some reason I need to get back to Snow Leopard(hopefully hypothetical case), is it possible and easy? - Will there be any performance issues with Mountain Lion on Macbook? The pointers on this thread will help in going for a (Mountain) Lion or staying with (Snow) Leopard. Thanks in advance Applers.