I use Lightroom 4 on my MAC. If I select CC (and LightRoom 6) will my current file structure and collections remain the same? Also, with CC will I be able to edit past photos on my MAC in LightRoom 6 in a remote location with no internet access (cruise for example)?
moving to lightroom forum
Yes, the new version of Lightroom will ask if you want to upgrade your previous catalog(s), and will keep their structure(s) intact.
Yes, you can use Lightroom CC offline for 99+ days:
Hope that fully answers your questions; if not then just post back!