From 1aa9ddbdeb9f077abed4fd344cad4da94c5d8c71 Mon Sep 17 00:00:00 2001
From: maron2000 <68574602+maron2000@users.noreply.github.com>
Date: Mon, 12 May 2025 22:55:20 +0900
Subject: [PATCH] Add explanations to build binaries targeting older macOS
 (10.12 and before)

---
 BUILD.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/BUILD.md b/BUILD.md
index 0f0bbd595..e6762a999 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -252,6 +252,13 @@ due to requiring parallel Homebrew installations running natively *and* under Ro
   ```
   make dosbox-x.app
   ```
+### _(Experimental)_ Building binaries for old macOS versions (10.12 Sierra and before)
+*Old macOS versions may be built using MacPorts libraries with slightly different procedures.
+```
+  sudo port install autoconf automake nasm glfw glew fluidsynth libslirp libpcap pkgconfig libsdl2_net libpng zlib
+  ./build-macosold
+```
+Use `./build-macosold-sdl2` for SDL2 builds.
 
 ## To compile DOSBox-X for DOS with HX-DOS platform
   * Start a 32-bit toolchain from the original MinGW (not the MinGW-w64 project).