Issue is solved. Problem was that versions of the game were different and older one could not load newer savefile.
Admin please close the topic.

Thank you.

I've tried to copy savegame ZIP file from Win to Mac, but game says it cannot be loaded.
Tomorrow i would try a reverse move - would try to copy savefile from Mac to Windows and tell you if successful.

Hello Factoria people !
I have two versions of the game on two notebooks, one runs MacOS Yosemite and second runs Win 7. is it possible to play the same savegame on boths ?
Thanks in advance.