Updated Compile in MacOS (markdown)

Compile-in-MacOS.md

@@ -117,7 +117,7 @@ In a terminal, run:
     cmake -Wno-dev -DDEBUG_OUTPUT=ON -DENABLE_RTLSDR=ON -DENABLE_BLADERF=ON -DENABLE_AIRSPY=ON -DENABLE_AIRSPYHF=ON -DENABLE_FUNCUBE=ON -DENABLE_HACKRF=ON -DENABLE_IIO=OFF -DENABLE_LIMESUITE=ON -DENABLE_MIRISDR=ON -DENABLE_PERSEUS=ON -DENABLE_SDRPLAY=ON -DENABLE_SOAPYSDR=OFF -DENABLE_XTRX=ON -DENABLE_USRP=ON -DENABLE_EXTERNAL_LIBRARIES=ON -DBUNDLE=ON -DRX_SAMPLE_24BIT=ON -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/opt/install/sdrangel -DPKG_CONFIG_USE_CMAKE_PREFIX_PATH=TRUE -DCMAKE_PREFIX_PATH="$QT_DIR/5.15.2/clang_64" ..
     make package
 
-On Arm, use -DCMAKE_PREFIX_PATH="$QT_DIR/6.6.0/macOS"
+On Arm, use -DENABLE_QT6=ON -DCMAKE_PREFIX_PATH="$QT_DIR/6.6.0/macOS"
 
 -DBUNDLE=ON is the option to create a .dmg