Hi, my new Macbook Air runs the latest Yosemite iOS version 10.10 operating system. The system requirements for Lightroom 5 only go up to version 10.9. Can anyone tell me if it will work OK?
Yes it will work fine.
Only two problems. One is shadow rendering is incorrect in Develop (was already incorrect in OS X 10.9) (Lightroom 5: ICC profiles clipped shadows under OSX) and if your network connection is slow, Maps won't work correctly (Lightroom: Issue with Map module in OS X 10.10 (Yosemite)). So apart from the Maps thing everything works as in 10.9
Thanks, I am a total novice and this will be my first time using Lightroom so I don't think either of those will be an issue just yet.