Need a little bit of advice here as it is difficult to find a direct answer. Planning to get a new Imac to replace my 6 year old MacBook Pro running OS X 10.8 I have older version of Lightoom & PS (post cloud version) on the MacBook. I know that the license is good for 2 devices or so, but not sure if I can still install the older version of Lightroom 5 and PS 13.0 on the new OS Sierra on Imac ? Lightroom was upgraded a couple of times to bring it to 5.0 version and I am not sure if I have fresh installer for 5.0. Any advice on the compatibility and the install method will be appreciated. As an additional question, any experience with 23 vs 27 inch Imac and if there is any other non apple option (all in ones) also can be of help. I see only Mac listed as the platform for PS when I login to my Adobe account and I think it may not work on Windows and hence I am leaning more towards Mac.