How to use a MAC with OS X as a serial console for a Banana Pi M3 running Linux
Buy an USB serial TTL adapater like this
For the chipset PL-2303HX one needs a driver. Try to find this
or a newer one. And install the package.
After a reboot you can connect the adapter. You should find a USB device with “ls -ld /dev/*usb*” like this
crw-rw-rw- 1 root wheel 18, 3 Jul 8 09:39 /dev/cu.usbserial crw-rw-rw- 1 root wheel 18, 2 Jul 8 09:48 /dev/tty.usbserial
Now connect the cables. Ground ( black ) to ground. Red cable ( +5V ) stays unconnected. Connect the white cable RxD from the adapter to TX of the BananaPi and the green cable TxD from the adapter to RX of the BananaPi.
Open a “terminal” session and enter
screen /dev/tty.usbserial 115200 8N1
After booting the Pi you should see the boot process.