Makefile: Fix compiling on macOS

Author: GhostlyDark

projects/unix/Makefile

@@ -122,16 +122,14 @@ ifeq ($(OS), LINUX)
   LDLIBS += -ldl
 endif
 ifeq ($(OS), OSX)
-  #xcode-select has been around since XCode 3.0, i.e. OS X 10.5
-  OSX_SDK_ROOT = $(shell xcode-select -print-path)/Platforms/MacOSX.platform/Developer/SDKs
-  OSX_SDK_PATH = $(OSX_SDK_ROOT)/$(shell ls $(OSX_SDK_ROOT) | tail -1)
+  OSX_SDK_PATH = $(shell xcrun --sdk macosx --show-sdk-path)
 
   ifeq ($(CPU), X86)
     ifeq ($(ARCH_DETECTED), 64BITS)
-      CFLAGS += -arch x86_64 -mmacosx-version-min=10.5 -isysroot $(OSX_SDK_PATH)
+      CFLAGS += -arch x86_64 -mmacosx-version-min=10.6 -isysroot $(OSX_SDK_PATH)
       LDLIBS += -ldl
     else
-      CFLAGS += -mmmx -msse -fomit-frame-pointer -arch i686 -mmacosx-version-min=10.5 -isysroot $(OSX_SDK_PATH)
+      CFLAGS += -mmmx -msse -fomit-frame-pointer -arch i686 -mmacosx-version-min=10.6 -isysroot $(OSX_SDK_PATH)
       LDLIBS += -ldl -read_only_relocs suppress
     endif
   endif