The latest version is CC2014 (version 10) for both platforms.
There is a update for InDesign CC 2014 (10.0), InDesign CC 2014(10.1).
Seems that your PC is updated to 10.1 but your Mac is not because of which a higher version file (10.1) saved on your PC is not opening in your Mac.
Please update your Mac to 10.1 version.
PS : The same update is both Mac and PC
If you do not wish to update your Mac, just save the file as IDML on your PC and that will do.
You would have no problem opening a file in version 10.0 if it was saved in 10.1, just as you would have no problem opening any other version dot release file in ay dot release of that version.
The problem here is the PC was updated to CC2014 and the Mac was not.
The OP also mentioned missing pictures when using IDML. IDML removes the previews, but you would need the linked images in any case for output, regardless of whether you use .indd or IDML to move the file.