Updated Compile in MacOS (markdown)

Compile-in-MacOS.md

@@ -22,7 +22,7 @@ In a terminal, run:
   * Install Qt 5.15.2 or Qt 6.6.0 (if Arm) from https://www.qt.io/download  (Installed in $HOME/Qt) (This includes cmake)
   * Install git from https://git-scm.com/download/mac if not included with XCode
   * Install svn (Subversion) if not installed as part of Xcode (From brew, macports or build from source see below)
-  * Install SDRPlay API from SDRplay.com (Catalina version SDRplay_RSP_API-MaxOSX-3.07.3.pkg) - Installs headers in to /usr/local
+  * Install SDRPlay API from SDRplay.com (For x64 SDRplay_RSP_API-MaxOSX-3.07.3.pkg - Installs headers in to /usr/local) - For ARM, use 3.12.1.)
   * Install Python 3 from https://www.python.org/downloads/ (If not already installed)
   * Install pip and other python packages: