On Apple Silicon set the fan to Auto before sleeping. systemDidWakeFromSleep will set the previous selection on wake

Classes/MachineDefaults.m

@@ -22,6 +22,9 @@
 
 #import "MachineDefaults.h"
 #import "NSFileManager+DirectoryLocations.h"
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <mach/machine.h>
 
 @interface MachineDefaults ()
 {
@@ -123,6 +126,14 @@
 	return defaultsDict;
 }
 
++ (BOOL)isAppleSilicon
+{
+    cpu_type_t cpu_type;
+    size_t size = sizeof(cpu_type);
+    sysctlbyname("hw.cputype", &cpu_type, &size, NULL, 0);
+    return cpu_type == CPU_TYPE_ARM64;
+}
+
 + (NSString *)computerModel
 {
     static NSString *computerModel = nil;