Fixes for modern macos

smc-command/Makefile

@@ -1,5 +1,5 @@
-CC = gcc
-CFLAGS = -mmacosx-version-min=10.4  -Wall -g -framework IOKit
+CC = clang
+CFLAGS = -Wall -g -framework IOKit
 CPPFLAGS = -DCMD_TOOL_BUILD
 
 all: smc 
@@ -11,4 +11,4 @@ smc.o: smc.h smc.c
 	$(CC) $(CPPFLAGS) -c smc.c
 
 clean:
-	-rm -f smc smc.o
+	@-rm -f smc smc.o