We could split hairs over what the word "version" means, but the broad answer is NO, Lightroom is the same on MAC and Windows. What exactly is your concern?
- Latest version of Lightrom 5 is 5.7.1.
- Please open Lightroom
- Select Help from menu bar and choose Update.
Direct download links:-
There are newer version of Lightroom 6/CC available.See the difference here Lightroom CC new features | Buy Adobe Photoshop Lightroom CC
Thanks for the speedy reply, i am totally new to this game of Adobe and before i spend some serious money i am prepared to buy a 2nd hand copy, through eBay test it then go with the newest version. i welcome any comments, so when its shown as mac/windows compatible i just wanted to be sure that it is.
Why don't you just download the 30-day free trial (it's free!) of the most current version?
again thanks, it will take me much longer than 30 days, thats why.