The link that is specifically listed for Mac is for a *very old* Mac which
could not understand the format of the .iso normally used so had a specific
netinst built for it.
Current Macbooks should be able to use the normal amd64 image.
You might want to look on the Debian wiki for InstallingDebianOn -
https://wiki.debian.org/InstallingDebianOn/Apple suggests that this is
feasible.
All the very best, as ever,
Andy Cater