I would be hesitant to try that, anyway: backup your iPhoto libraries first. I would at least assume conflicts, as soon as iPhoto is opened on 2 computers at the same time. I would suggest you wait for http://www.apple.com/ios/ios8/photos/ and OS X Yosemite, which will bring you iCloud Foto Library. That is exactly what you are trying to achieve and it will include iOS devices as well.