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

Classes/FanControl.m

@@ -29,7 +29,6 @@
 #import <Security/AuthorizationTags.h>
 #import <Sparkle/SUUpdater.h>
 #import "SystemVersion.h"
-#include "TargetConditionals.h"
 
 @interface FanControl ()
 + (void)copyMachinesIfNecessary;
@@ -151,11 +150,7 @@ NSUserDefaults *defaults;
 			@0, PREF_AC_SELECTION,
 			@0, PREF_CHARGING_SELECTION,
 			@0, PREF_MENU_DISPLAYMODE,
-#if TARGET_CPU_ARM64
+			[MachineDefaults isAppleSilicon] ? @"Tp0D" : @"TC0D", PREF_TEMPERATURE_SENSOR,
-            @"Tp0D",PREF_TEMPERATURE_SENSOR,
-#else
-            @"TC0D",PREF_TEMPERATURE_SENSOR,
-#endif
             @0, PREF_NUMBEROF_LAUNCHES,
             @NO,PREF_DONATIONMESSAGE_DISPLAY,
 			[NSArchiver archivedDataWithRootObject:[NSColor blackColor]],PREF_MENU_TEXTCOLOR,
@@ -540,6 +535,17 @@ NSUserDefaults *defaults;
 }
 
 
+-(void)setFansToAuto:(bool)is_auto
+{
+	for (int fan_index=0;fan_index<[[FavoritesController arrangedObjects][0][PREF_FAN_ARRAY] count];fan_index++) {
+		[self setFanToAuto:fan_index is_auto:is_auto];
+	}
+}
+
+-(void)setFanToAuto:(int)fan_index is_auto:(bool)is_auto {
+	[smcWrapper setKey_external:[NSString stringWithFormat:@"F%dMd",fan_index] value:is_auto ? @"00" : @"01"];
+}
+
 //set the new fan settings
 
 -(void)apply_settings:(id)sender controllerindex:(int)cIndex{
@@ -554,7 +560,7 @@ NSUserDefaults *defaults;
             [smcWrapper setKey_external:[NSString stringWithFormat:@"F%dMn",i] value:[[FanController arrangedObjects][i][PREF_FAN_SELSPEED] tohex]];
         } else {
             bool is_auto = [[FanController arrangedObjects][i][PREF_FAN_AUTO] boolValue];
-            [smcWrapper setKey_external:[NSString stringWithFormat:@"F%dMd",i] value:is_auto ? @"00" : @"01"];
+            [self setFanToAuto:i is_auto:is_auto];
             float f_val = [[FanController arrangedObjects][i][PREF_FAN_SELSPEED] floatValue];
             uint8 *vals = (uint8*)&f_val;
             //NSString str_val = ;
@@ -681,9 +687,7 @@ NSUserDefaults *defaults;
     }
     error = nil;
     if ([[MachineDefaults computerModel] rangeOfString:@"MacBookPro15"].location != NSNotFound) {
-        for (int i=0;i<[[FavoritesController arrangedObjects][0][PREF_FAN_ARRAY] count];i++) {
+        [self setFansToAuto:true];
-            [smcWrapper setKey_external:[NSString stringWithFormat:@"F%dMd",i] value:@"00"];
-        }
     }
 
     NSString *domainName = [[NSBundle mainBundle] bundleIdentifier];
@@ -738,6 +742,13 @@ NSUserDefaults *defaults;
 
 #pragma mark **Power Watchdog-Methods**
 
+- (void)systemWillSleep:(id)sender{
+	if ([MachineDefaults isAppleSilicon]) {
+		[FanControl setRights];
+		[self setFansToAuto:true];
+	}
+}
+
 - (void)systemDidWakeFromSleep:(id)sender{
 	[self apply_settings:nil controllerindex:[[defaults objectForKey:PREF_SELECTION_DEFAULT] intValue]];
 }

Classes/MachineDefaults.h

@@ -30,6 +30,7 @@
 	int machine_num;
 }
 
++ (BOOL)isAppleSilicon;
 + (NSString *)computerModel;
 - (instancetype)init:(NSString*)p_machine ;
 

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;

Classes/Power.h

@@ -58,6 +58,8 @@
 //delegate Prototypes 
 @interface NSObject (PowerDelegate)
 
+- (void)systemWillSleep:(id)sender;
+
 - (void)systemDidWakeFromSleep:(id)sender;
 
 - (void)powerChangeToBattery:(id)sender;

Classes/Power.m

@@ -101,6 +101,7 @@ static void powerSourceChanged(void * refCon)
 	switch (messageType)
 	{
 		case kIOMessageSystemWillSleep:
+			[_delegate systemWillSleep:self];
 			IOAllowPowerChange(root_port, (long)messageArgument);
 		break;
 		case kIOMessageCanSystemSleep:

Classes/smcWrapper.m

@@ -22,7 +22,6 @@
  */
 
 #import "smcWrapper.h"
-#include "TargetConditionals.h"
 #import <CommonCrypto/CommonDigest.h>
 NSString * const smc_checksum=@"4fc00a0979970ee8b55f078a0c793c4d";
 
@@ -71,11 +70,11 @@ NSArray *allSensors;
     NSString *sensor = [[NSUserDefaults standardUserDefaults] objectForKey:PREF_TEMPERATURE_SENSOR];
     SMCReadKey2((char*)[sensor UTF8String], &val,conn);
     retValue = [self convertToNumber:val];
-#if TARGET_CPU_ARM64
+    if ([MachineDefaults isAppleSilicon]) {
         allSensors = [NSArray arrayWithObjects:@"Tp0D",@"Tp0P",nil];
-#else
+    } else {
         allSensors = [NSArray arrayWithObjects:@"TC0D",@"TC0P",@"TCAD",@"TC0H",@"TC0F",@"TCAH",@"TCBH",nil];
-#endif
+    }
     if (retValue<=0 || floor(retValue) == 129 ) { //workaround for some iMac Models
         for (NSString *sensor in allSensors) {
             SMCReadKey2((char*)[sensor UTF8String], &val,conn);