diff --git a/Kit/helpers.swift b/Kit/helpers.swift
index 516f9417..93371a43 100644
--- a/Kit/helpers.swift
+++ b/Kit/helpers.swift
@@ -1076,7 +1076,7 @@ public class SMCHelper {
         guard let helper = self.helper(nil) else { return }
         helper.setFanSpeed(id: id, value: speed) { result in
             if let result, !result.isEmpty {
-                print(result)
+                NSLog("set fan speed: \(result)")
             }
         }
     }
@@ -1085,11 +1085,18 @@ public class SMCHelper {
         guard let helper = self.helper(nil) else { return }
         helper.setFanMode(id: id, mode: mode) { result in
             if let result, !result.isEmpty {
-                print(result)
+                NSLog("set fan mode: \(result)")
             }
         }
     }
     
+    public func powermetrics(_ samplers: [String], completion: @escaping (String?) -> Void) {
+        guard let helper = self.helper(nil) else { return }
+        helper.powermetrics(samplers) { result in
+            completion(result)
+        }
+    }
+    
     public func isActive() -> Bool {
         return self.connection != nil
     }
diff --git a/Modules/CPU/main.swift b/Modules/CPU/main.swift
index b9a78604..1d6a0fdc 100644
--- a/Modules/CPU/main.swift
+++ b/Modules/CPU/main.swift
@@ -32,13 +32,6 @@ public struct CPU_Limit: Codable {
     var speed: Int = 0
 }
 
-public struct CPU_Frequency: Codable {
-    var ECores: Int? = nil
-    var PCores: Int? = nil
-    var power: Int? = nil
-    var cores: [Int] = []
-}
-
 public class CPU: Module {
     private let popupView: Popup
     private let settingsView: Settings
diff --git a/SMC/Helper/Info.plist b/SMC/Helper/Info.plist
index 07ad550c..e606227f 100644
--- a/SMC/Helper/Info.plist
+++ b/SMC/Helper/Info.plist
@@ -7,7 +7,7 @@
 	<key>CFBundleName</key>
 	<string>eu.exelban.Stats.SMC.Helper</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0.0</string>
+	<string>1.0.1</string>
 	<key>CFBundleVersion</key>
 	<string>1</string>
 	<key>SMAuthorizedClients</key>
diff --git a/SMC/Helper/main.swift b/SMC/Helper/main.swift
index 03dd1550..ea7db856 100644
--- a/SMC/Helper/main.swift
+++ b/SMC/Helper/main.swift
@@ -69,7 +69,7 @@ class Helper: NSObject, NSXPCListenerDelegate, HelperProtocol {
     private func uninstallHelper() {
         let process = Process()
         process.launchPath = "/bin/launchctl"
-        process.qualityOfService = QualityOfService.utility
+        process.qualityOfService = QualityOfService.userInitiated
         process.arguments = ["unload", "/Library/LaunchDaemons/eu.exelban.Stats.SMC.Helper.plist"]
         process.launch()
         process.waitUntilExit()
@@ -109,7 +109,14 @@ extension Helper {
             return
         }
         let result = syncShell("\(smc) fan \(id) -m \(mode)")
-        completion(result)
+        
+        if let error = result.error, !error.isEmpty {
+            NSLog("error set fan mode: \(error)")
+            completion(nil)
+            return
+        }
+        
+        completion(result.output)
     }
     
     func setFanSpeed(id: Int, value: Int, completion: (String?) -> Void) {
@@ -117,28 +124,62 @@ extension Helper {
             completion("missing smc tool")
             return
         }
+        
         let result = syncShell("\(smc) fan \(id) -v \(value)")
-        completion(result)
+        
+        if let error = result.error, !error.isEmpty {
+            NSLog("error set fan speed: \(error)")
+            completion(nil)
+            return
+        }
+        
+        completion(result.output)
     }
     
-    public func syncShell(_ args: String) -> String {
+    func powermetrics(_ samplers: [String], completion: @escaping (String?) -> Void) {
+        let result = syncShell("powermetrics -n 1 -s \(samplers.joined(separator: ",")) --sample-rate 1000")
+        if let error = result.error, !error.isEmpty {
+            NSLog("error call powermetrics: \(error)")
+            completion(nil)
+            return
+        }
+        completion(result.output)
+    }
+    
+    public func syncShell(_ args: String) -> (output: String?, error: String?) {
         let task = Process()
         task.launchPath = "/bin/sh"
         task.arguments = ["-c", args]
-        let pipe = Pipe()
         
-        task.standardOutput = pipe
-        task.launch()
-        task.waitUntilExit()
+        let outputPipe = Pipe()
+        let errorPipe = Pipe()
         
-        let data = pipe.fileHandleForReading.readDataToEndOfFile()
-        return String(data: data, encoding: .utf8)!
+        defer {
+            outputPipe.fileHandleForReading.closeFile()
+            errorPipe.fileHandleForReading.closeFile()
+        }
+        
+        task.standardOutput = outputPipe
+        task.standardError = errorPipe
+        
+        do {
+            try task.run()
+        } catch let err {
+            return (nil, "syncShell: \(err.localizedDescription)")
+        }
+        
+        let outputData = outputPipe.fileHandleForReading.readDataToEndOfFile()
+        let errorData = errorPipe.fileHandleForReading.readDataToEndOfFile()
+        let output = String(decoding: outputData, as: UTF8.self)
+        let error = String(decoding: errorData, as: UTF8.self)
+        
+        return (output, error)
     }
     
     func uninstall() {
         let process = Process()
         process.launchPath = "/Library/PrivilegedHelperTools/eu.exelban.Stats.SMC.Helper"
-        process.qualityOfService = QualityOfService.utility
+        process.qualityOfService = QualityOfService.userInitiated
         process.arguments = ["uninstall", String(getpid())]
         process.launch()
         exit(0)
diff --git a/SMC/Helper/protocol.swift b/SMC/Helper/protocol.swift
index 1f70a348..e22e52d2 100644
--- a/SMC/Helper/protocol.swift
+++ b/SMC/Helper/protocol.swift
@@ -17,6 +17,7 @@ import Foundation
     
     func setFanMode(id: Int, mode: Int, completion: @escaping (String?) -> Void)
     func setFanSpeed(id: Int, value: Int, completion: @escaping (String?) -> Void)
+    func powermetrics(_ samplers: [String], completion: @escaping (String?) -> Void)
     
     func uninstall()
 }