Included in this repository are full working samples of dhcpd.conf and tftpd-hpa configurations for Netboot'ing ESXi 5.5, 6.0 & 6.5 onto Apple Mac Hardware. There is also a very basic Kickstart script ks.cfg that can be used to test a scripted installation.
Please refer to this blog article How to Netboot install ESXi onto Apple Mac Hardware? for complete details on how to setup Netboot Server for remotely booting and installing ESXi onto Apple Mac Hardware.