Thanks a lot.
I found also on AppStore "WMF Converter Pro" and "WordCraft".
Only "GraphicConverter" and "WMF Converter Pro" have free to try version on there site.
I've about 500 wmf and 350 emf images.
I'll test both and write a report tomorrow.
It's my report
"GraphicConverter" is a complex image converter, more expensive.
"WMF Converter Pro" works only for converting WMF/EMF on mac, and is cheaper.
All software excelent to convert all my 523 WMFs, but several EMFs was not converted correctly. There were different EMFs: two for "GraphicConverter" and three for "WMF Converter Pro" from range of 356 my emf images.
Conclusion:
All these application is perfect for converting WMF/EMF pictures from Windows to MAC. So, today I don't know what I really need, specialized wmf converter or wide range image converter.