Check out "Headless Installation"
==== Get Raspbian (or lite)
— Download Raspbian (Raspbian Lite)
http://www.raspberrypi.org/downloads/
=== get SD card formatter: https://etcher.io
- install it
=== put Raspbian-lite on the (micro) SD card
Use Etcher to Flash the image onto card
=== Mount the card to mac (to configure headless configuration)
- Pull card out, reinsert so it is mounted for next steps
=== Enable SSH
- create file called "ssh" (or ssh.txt) in the Boot partition
=== Setup WiFi Headless
- create the file wpa_supplicant.conf in the boot partition
(quote chars must be straight up/down, traditional, not slanted/matched Unicode chars
country=US
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="your_ssid"
psk="your_pw"
key_mgmt=WPA-PSK
}
Eject the card, boot with card in the RPi3
use arp -a on mac to see what IP the pi got or check your router config
ssh to the pi.