SD Card No Longer Seen by MAC after using card SDFormatter software for MAC

I bought a Extreme Pro SDXC card for my Leica (which is compatible) informed that I needed to use a SD Formatter to get the full 64GB capacity. Use the industry standard SDFormatter software. Format went OK. Images captured OK by camera. Problem is that now my MAC no longer can see this or any other Sandisk card previously formatted  using SDFormatter software. cant even see other cards which have not been refomattedusing the SDFormatter software??