Thanks for your reply.
But what about the package that says 10.8 or 10.9? I am afraid this won't run on my computer (OS X 10.10.4 and I waste a lot of money because I can't return Lightroom 6 because I opened the package.
Having a system requirement with 10.8 & 10.9 means that it is supported for anything greater than 10.8 & above till 10.10
I have the latest version of Lightroom on my Macbook Pro (10.10.2) and it’s running perfectly. I’ve not updated to 10.10.4 yet as I’m have no need for Photos for OSX or other features. I prefer iPhoto for the time being, which I only use for displaying events and slideshows as LR is my main editing app.
Oke. Thanks for your information Mandhir.
Have a nice weekend.