Using MYOB on a PC and MAC

I have a PC which I use to work from home on but use MAC in the office.
I’ve recently installed MYOB v14 successfully at home onto my PC which
meant that I could burn the company accounts file to disc, take it home
and work from home on this file.
Having inputted a substantial amount of data at home, I burnt the
updated file to disc and returned to the office where my MAC now
doesn’t seem able to open the data file. It sees the file but won’t allow
me to open it directly or select it if I try to open it through MYOB. What
am I doing wrong?