SDL: Updated INSTALL.md

From b33420cac7e999ed06054dd769b38a3b9d869e3d Mon Sep 17 00:00:00 2001
From: ChedRed <[EMAIL REDACTED]>
Date: Mon, 8 Apr 2024 15:51:30 -0700
Subject: [PATCH] Updated INSTALL.md

Added a subsection for building MacOS universal packages.
---
 INSTALL.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/INSTALL.md b/INSTALL.md
index f071eab0fc363..647341d3b989f 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -20,6 +20,10 @@ Read docs/README-macos.md
 
 Run: `cmake -S . -B build && cmake --build build && cmake --install build`
 
+### macOS for universal architecture:
+
+Run: `cmake -S . -B build -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" && cmake --build build && cmake --install build`
+
 ## Linux and other UNIX systems:
 
 Run: `cmake -S . -B build && cmake --build build && cmake --install build`