jo sa ys…
David, first of all, the problem in your print colours not matching what you see on screen is probably not due to iPhoto, but more to do with the method of printing. How are you printing them? Are you sending them to a photo shop, or are you printing them out yourself on a home printer? There are professional solutions for colour calibrating your monitor, but this would probably be overkill for you. Instead, we’d recommend changing the method of printing and seeing if the results differ dramatically.
Secondly, let’s address updating your Mac. El Capitan didn’t come on DVD, so that’s not the issue. If you’re running Mavericks, there’s no reason why you can’t simply download the update via the Mac App Store. This will upgrade you to the latest macOS Sierra, but again, we can think of no reason not to do this instead of going for El Capitan.
Po rtrait mo de
Portrait mode on my iPhone is pretty neat. One day, I’ll probably never need to use my proper cameras because the mobile phone will be good enough in a lot of cases. Who was it that said: the best camera you have is the one in your hand right now.