Use Activity Monitor to Find Performance Issues (macOS)
If your Mac feels slow, overheats, or apps freeze, Activity Monitor can help you identify what’s causing the problem. Follow these simple steps 👇
🔹 Step 1: Open Activity Monitor
• 🔍 Press Command (⌘) + Space (Spotlight Search)
• ⌨️ Type “Activity Monitor”
• ➡️ Press Enter
Alternative:
📂 Go to Applications > Utilities > Activity Monitor
🔹 Step 2: Understand the Main Tabs
• 🧠 CPU → Shows processing power usage
• 💾 Memory → Displays RAM usage
• 🔋 Energy → Battery impact (MacBooks)
• 💽 Disk → Read/write activity
• 🌐 Network → Internet usage
🔹 Step 3: Check CPU Usage
• 🖱️ Click the CPU tab
• 🔼 Sort by % CPU
👉 Look for:
• ⚠️ Apps using 80%–100%+ CPU
• 🔁 Processes always at the top
📌 These can slow down your Mac
🔹 Step 4: Analyze Memory Usage
• 🖱️ Go to the Memory tab
• 📊 Check the Memory Pressure graph
👉 Indicators:
• 🟢 Green → Normal
• 🟡 Yellow → Moderate usage
• 🔴 Red → System struggling
📌 Red means too many apps are using RAM
🔹 Step 5: Identify Problematic Apps
• 🔍 Look for apps that:
• ⚠️ Use high CPU or Memory
• ❌ Show “Not Responding”
• 📈 Keep increasing usage
🔹 Step 6: Force Quit a Problem App
• 🖱️ Select the app/process
• ❌ Click the “X” (Stop) button
• ✅ Choose:
• Quit (safe)
• ⚠️ Force Quit (if frozen)
🚫 Avoid quitting unknown system processes
🔹 Step 7: Check Energy Impact (MacBooks)
• 🔋 Click the Energy tab
• 🔼 Sort by Energy Impact
👉 High usage apps can:
• 🔻 Drain battery fast
• 🌡️ Cause overheating
🔹 Step 8: Monitor Disk Activity
• 💽 Open the Disk tab
👉 Watch for:
• 📊 High Reads/Writes
• 🔁 Constant disk activity
📌 Can slow system performance
🔹 Step 9: Inspect Network Usage
• 🌐 Go to the Network tab
👉 Helps detect:
• 📥 Heavy downloads/uploads
• 🕵️ Background data usage
🔹 Step 10: Take Action
• 🧹 Close unnecessary apps
• 🔄 Restart problematic programs
• ⚙️ Reduce startup items
• 🔁 Restart your Mac if needed
✅ Pro Tip
• 🔄 Update apps regularly
• 🧼 Reinstall faulty apps
• 🚀 Use lighter alternatives for heavy software
💡 Quick Summary:
• 🧠 CPU → Processing load
• 💾 Memory → RAM pressure
• 🔋 Energy → Battery usage
• 💽 Disk → Storage activity
• 🌐 Network → Internet usage