Need client to view P2 Files on Mac without FCP

I have read a few posts on this subject but I just want to be certain before I tell the client which codec to download so sorry if this issue has already been addressed. Shane Ross gave some great info, but i want to be sure which codec to tell the client to download. The footage was shot on a Panasonic 2700, the files are DVCPRO HD.

The client has a newer Macbook (sorry, I don't know how new but he said within past couple years). It would appear that Calibrated Software is the way to go,and they download the DVCPRO Encode. The files are MXF, so could they download the free software from Panasonic? If so, which one do they download? is the P2 Viewer for Mac? DO they need the P2 Driver/Card formatter? Sorry, I don't understand the difference.

Thanks so much!