asmFish is NOT the same engine as Stockfish, so the answer by Dave is wrong. The difference is that asmFish is written in x86 Assembly (~20% faster), while Stockfish in C++.
Here is an issue I opened to test basically the time fasmg did to compile asmFish. It was closed, however, because the latest fasmg version fails to compile asmFish. The latest working version is this one.
You can download the version you want, but this is not necessary. You just need to open a command line and clone the repository:
git clone -b master https://github.com/lantonov/asmFish.git
cd asmFish to enter the directory and
make.bat to compile.
For what it's worth:
There are already MacOS binaries in the main repository. They are in the
There is also an archive of the executables in the executables branch, which is rarely updated.
You can directly compile asmFish from MacOS from the command line just having the whole
x86 folder and the
fasmg "x86\fish.asm" "asmFishX_type" -e 1000 -i "VERSION_OS='X'" -i "PEDANTIC = 1" -i "VERSION_POST = 'version'"
version with the version post you want (