i found an easy way to do it !!!!!!!!!!!!!!!!
1- connect your R16 interface to the computer ( mac) powered by USB cable
2-press USB (on interface) and select card reader
3- go to FINDER / ZOOM _SD / SYS / (and install the folder called) ZOOM.ZDT (you'll need kext helper)
4-download the latest driver that its available on the Zoom.co.jp website and hit INSTALL
5- once the driver installation its completed eject the ZOOM_SD hard drive AND RESTART THE
COMPUTER (DONT FORGET to eject the ZOOM_SD hard drive first)
you'll find the driver installed in APPLICATIONS / SYSTEMS PREFERENCES / SOUND ( THE R16 MUST BE
CONNECTED TO THE COMPUTER ON INTERFACE MODE TO SEE IT!!!!!!!!!!!!!!!!!
''it shouldn't take more than 3 minutes if you already had the programs and drivers''