If they are compressed on the Mac (BinHex or SIT), you should be good.
The usual problem is the "resource fork" on the old MACs, that the PC doesn't support.
As long as it's compressed originally, then you should be able to transfer it via a PC, then to the Amiga, then to the emulated Mac.
Then you need to decompress it in your emulated Mac. (or BinHex, which isn't really compression, but..)
desiv
