Update readme

This is build fix for 10.14 compat.

MAME.xcodeproj/project.pbxproj

@@ -408,7 +408,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 0.227.0;
+				CURRENT_PROJECT_VERSION = 0.235.0;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				EXCLUDED_ARCHS = arm64;
 				GCC_INPUT_FILETYPE = sourcecode.cpp.objcpp;
@@ -436,7 +436,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 0.227.0;
+				CURRENT_PROJECT_VERSION = 0.235.0;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				EXCLUDED_ARCHS = arm64;
 				GCC_INPUT_FILETYPE = sourcecode.cpp.objcpp;

README.md

@@ -10,7 +10,7 @@ You must build the `mamearcade_headless.dylib` dynamic library before building t
 
 ```sh
 $ cd deps/mame
-$ make macosx_x64_clang OSD="headless" verbose=1 TARGETOS="macosx" CONFIG="headless-rel" TARGET=mame SUBTARGET=arcade -j8
+$ make macosx_x64_clang OSD="headless" verbose=1 TARGETOS="macosx" CONFIG="release" TARGET=mame SUBTARGET=arcade MACOSX_DEPLOYMENT_TARGET=10.14 -j8
 ```
 
 Depending on your hardware, this could take a _long_ time, but if successful, you will have a file named `mamearcade_headless.dylib` in the current directory.