diff --git a/BUILDING.md b/BUILDING.md
new file mode 100644
index 000000000..1661823fe
--- /dev/null
+++ b/BUILDING.md
@@ -0,0 +1,14 @@
+## macOS
+
+Compilation has been tested on macOS Monterey 12.3.1.
+
+You'll need the XCode command-line tools and three packages installable with
+[Homebrew](https://brew.sh/):
+
+```
+brew install pkg-config sdl2 sdl2_net
+```
+
+It's best to set up `Z` and `X` for firing the left and right sidekicks, as the
+default binding of `Ctrl` for the left sidekick interacts with the arrow keys
+to switch desktops while playing in full screen mode.
diff --git a/Makefile b/Makefile
index ff85aa100..0c8c2da50 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,10 @@
 # BUILD SETTINGS ###############################################################
 
+
+ifeq (Darwin, $(shell uname))
+    PLATFORM := UNIX
+    TYRIAN_DIR = $(gamesdir)/opentyrian2000
+else
 ifneq ($(filter Msys Cygwin, $(shell uname -o)), )
     PLATFORM := WIN32
     TYRIAN_DIR = C:\\TYRIAN
@@ -7,6 +12,7 @@ else
     PLATFORM := UNIX
     TYRIAN_DIR = $(gamesdir)/opentyrian2000
 endif
+endif
 
 WITH_NETWORK := true