diff --git a/Makefile b/Makefile
index a8cce14..f2f3742 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,16 @@
+UNAME := $(shell uname)
+ifeq ($(UNAME), Darwin)
+	STAT := gstat
+else
+	STAT := stat
+endif
+
 all: tetros.img
 
 tetros.img: tetros.asm Makefile
 	nasm -d DEBUG -f bin tetros.asm -o tetros.img
-	@echo "size is" `stat -c "%s" tetros.img`
-	@if [ `stat -c "%s" tetros.img` -gt 446 ]; then \
+	@echo "size is" `$(STAT) -c "%s" tetros.img`
+	@if [ `$(STAT) -c "%s" tetros.img` -gt 446 ]; then \
 		bash -c 'echo -e "\e[91mOutput exceeded size of 446 bytes.\e[0m"'; \
 		rm -f tetros.img; exit 1; fi
 	nasm -f bin tetros.asm -o tetros.img
diff --git a/README.md b/README.md
index dd7253d..5b8878f 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ After that you should be able to boot the stick to play TetrOS.
 
 ## Compiling the sources
 
-The repository already contains an image which you can use for testing. However, if you want to compile the image from the sources you need nasm, a general prupose x86 assembler to be installed on your system. On Ubuntu you can can install it via the command `sudo apt-get install nasm`.
+The repository already contains an image which you can use for testing. However, if you want to compile the image from the sources you need nasm, a general prupose x86 assembler to be installed on your system. On Ubuntu you can can install it via the command `sudo apt-get install nasm`. On macOS you will need [homebrew](http://brew.sh/) to install `nasm` and `binutils`.
 
 If `nasm` is installed you can compile the sources by executing `make`. This will create the image `tetros.img`. After that you can run the image via qemu or you can copy the image via `dd` on an USB disk or a disk (see above).