Install dependencies with homebrew:
brew install cmake freetype gettext gmp hiredis jpeg jsoncpp leveldb libogg libpng libvorbis luajit zstd gettext
Download source (this is the URL to the latest of source repository, which might not work at all times) using Git:
git clone --depth 1 https://github.com/minetest/minetest.git
cd minetest
Download Minetest's fork of Irrlicht:
git clone --depth 1 --branch "$(cat misc/irrlichtmt_tag.txt)" https://github.com/minetest/irrlicht.git lib/irrlichtmt
mkdir build
cd build
cmake .. \
-DCMAKE_FIND_FRAMEWORK=LAST \
-DCMAKE_INSTALL_PREFIX=../build/macos/ \
-DRUN_IN_PLACE=FALSE -DENABLE_GETTEXT=TRUE
make -j$(sysctl -n hw.logicalcpu)
make install
# M1 Macs w/ MacOS >= BigSur
codesign --force --deep -s - macos/minetest.app
open ./build/macos/minetest.app