- Need Upgrade? - GarageBand file on iPad2 to Macbook

Would love to get some feedback here.... I know how to transfer GarageBand files from my iPad2 to Mac, but when I try to open the file up on my Macbook it says I need to upgrade to the latest version. The problem is that I have checked for upgrades (which I am up to date) and I have GarageBand '11 and as far as I know, that is up to date since there are no updates for the Mac in general (I just checked). Please advise!

Thanks!