What Is the SMC on Intel Macs?
The intel mac smc reset clears the System Management Controller (SMC). This chip is located on Intel Mac motherboards and handles low‑level hardware functions. It controls power, battery charging, fans, keyboard backlighting, LED indicators, and Wi‑Fi power management. When the SMC becomes confused, many problems can appear.
For example, your Mac might not turn on properly. The battery may refuse to charge. Fans could spin at full speed for no reason. Wi‑Fi might disconnect after sleep or during heavy use. Resetting the SMC fixes these glitches without deleting any personal data.
If your mac keeps disconnecting from wifi, especially after sleep or during high CPU load, a corrupted SMC could be the hidden cause. For general Wi‑Fi troubleshooting, see our pillar post. This guide focuses exclusively on SMC resets for Intel Macs.
Symptoms That Require an SMC Reset on Intel Mac
Experiencing one or more of these issues suggests an SMC reset may help. Here are the most common symptoms:
Power‑related problems: Your Mac does not turn on when you press the power button. Alternatively, it turns on by itself without any input. It may also shut down or go to sleep unexpectedly.
Battery issues: The Mac stops charging while plugged in, even though the charger works on other devices. Battery percentage jumps around erratically. The Mac sometimes shuts down when the battery shows 20‑30% charge remaining.
Fan noise: Fans run at full speed constantly, even when the Mac is idle and cool. Conversely, fans may not spin at all under heavy load, causing the Mac to overheat.
Sleep and wake problems: Your Mac fails to wake from sleep. The screen stays black, but fans spin. Wi‑Fi disconnects immediately after waking (see pillar post Fix 7 for more on this).
Port issues: USB or Thunderbolt ports stop working until you restart the Mac.
Wi‑Fi and Bluetooth struggles: The connection drops when the Mac is under heavy load, such as during video calls or large downloads. Wi‑Fi works for a few minutes, then stops until reboot. Bluetooth and Wi‑Fi interfere heavily with each other.
If your mac keeps disconnecting from wifi only after sleep or when the Mac gets hot, the SMC is a likely suspect. Have you already tried other fixes like AWDL adjustments or router settings? If nothing else has worked, an SMC reset is worth attempting.
For similar issues on Apple Silicon Macs, skip to the section below – those models do not require SMC resets.
Before You Reset SMC: Try These First
Resetting the SMC is safe, but it is also a blunt instrument. Therefore, try these simpler steps first.
- Restart your Mac normally (Apple menu > Restart). Some power glitches clear on reboot.
- Shut down, wait 30 seconds, then power on – this alone can reset some SMC functions.
- Reset NVRAM (press Option + Command + P + R at startup). This handles display and startup disk issues, not power. However, it is still worth trying.
- Check for macOS updates – see our how to update macOS safely guide (internal link placeholder #7 from pillar).
If none of these help, proceed with the SMC reset for your specific Intel Mac model.
For NVRAM details, see our reset macOS network settings to default (internal link placeholder #19 from pillar).
How to Reset SMC on Intel MacBooks (Pre‑2018)
This method works for MacBook, MacBook Air, and MacBook Pro models from before 2018. These older Macs do not have the T2 security chip.
Steps:
- Shut down your Mac. Unplug the power adapter.
- On the built‑in keyboard, press and hold three keys on the left side:
- Shift (⇧)
- Control (⌃)
- Option (⌥)
- While holding those three keys, also press and hold the Power button (or Touch ID button on models that have it).
- Hold all four keys for ten seconds. Do not release them early.
- Release all keys.
- Plug in the power adapter.
- Press the Power button normally to turn on your Mac.
After the reset, your Mac may take longer to boot. This is normal, so do not worry. Test Wi‑Fi stability for at least an hour after logging in.
For more on pre‑2018 Intel Macs, see our Mac sleep mode optimizer (internal link placeholder #17 from pillar). Sleep settings can also affect SMC behavior.
How to Reset SMC on Intel MacBooks with T2 Chip (2018‑2020)
MacBooks from 2018 to 2020 (MacBook Air 2018‑2020, MacBook Pro 2018‑2020) include the Apple T2 security chip. Consequently, the SMC reset procedure is different.
Steps:
- Shut down your Mac. Unplug the power adapter.
- Press and hold the following three keys on the right side of the keyboard:
- Control (⌃) – the right Control key
- Option (⌥) – the right Option key
- Shift (⇧) – the right Shift key
- Keep holding those three keys. Then also press and hold the Power button (or Touch ID button).
- Hold all four keys for seven seconds. Your Mac may turn on, then off again. Keep holding regardless.
- Release all keys.
- Plug in the power adapter.
- Press the Power button normally to turn on your Mac.
If the Mac does not turn on after following these steps, try again. Make sure you are using the right‑side keys – using the left side will not work on T2 Macs.
For issues with enterprise Wi‑Fi on T2 Macs, see pillar post Fix 4 (M5 chip 802.1X). That problem is not directly related, but similar authentication bugs can affect T2 models as well.
How to Reset SMC on Intel Desktop Macs (iMac, Mac mini, Mac Pro)
Desktop Intel Macs have a much simpler SMC reset procedure. No keyboard combinations are needed.
Steps:
- Shut down your Mac.
- Unplug the power cord from the Mac itself (not just from the wall outlet – remove it from the computer).
- Wait 15 seconds.
- Plug the power cord back in.
- Wait another 5 seconds, then press the Power button to turn on your Mac.
That is all there is to it. This method works for iMac, Mac mini, and Mac Pro models.
For iMacs with built‑in displays, also check that the display is not causing power issues. For Mac mini, this reset often fixes Thunderbolt and USB port problems as well.
For more desktop Mac troubleshooting, see our router setup guide for Mac users (internal link placeholder #9 from pillar). That guide focuses on network issues, which may still be relevant after an SMC reset.
What to Do If SMC Reset Does Not Fix Wi‑Fi
If your mac keeps disconnecting from wifi even after an SMC reset, the problem lies elsewhere. Work through these additional steps:
- Reset NVRAM – this is especially helpful if display or startup disk issues accompany your Wi‑Fi drops.
- Run Apple Diagnostics – restart your Mac and hold the D key. This tests the hardware, including the Wi‑Fi card.
- Check for third‑party power management software – apps like Turbo Boost Switcher, Volta, or Macs Fan Control can interfere with SMC behavior. Uninstall them temporarily to test.
- Replace the Wi‑Fi card (on older Intel Macs only). If your Mac is from 2015 or earlier, the Wi‑Fi card can physically fail. Apple repair shops can diagnose this.
- Return to the pillar post – work through AWDL (Fix 5), Bluetooth (Fix 6), and sleep settings (Fix 7) if you have not already.
For a full network diagnostic path, see our macOS network troubleshooting toolkit (internal link placeholder #20 from pillar).
Apple Silicon Macs: No SMC Reset Needed
If you own an Apple Silicon Mac (M1, M2, M3, M4, or M5), there is no separate SMC chip. Power management is built directly into the main processor. Therefore, you cannot reset the SMC manually.
What to do instead:
Shut down your Mac completely (Apple menu > Shut Down). Wait 30 seconds. Then turn it back on. This simple power cycle accomplishes the same effect as an SMC reset on Intel Macs.
If you still have power or Wi‑Fi issues on Apple Silicon after a full shutdown and restart, the problem is likely a software bug (macOS) or a hardware fault (logic board). Update to the latest macOS (see how to update macOS safely placeholder #7). If that does not help, contact Apple Support.
For Apple Silicon Wi‑Fi 6E issues, see our Mac Wi‑Fi 6E issues guide (cluster post #6). That guide covers roaming and band‑switching problems specific to newer Macs.
Frequently Asked Questions
Q: How often should I reset SMC on my Intel Mac?
Only when you experience the symptoms listed above. Resetting the SMC unnecessarily does not improve performance. In fact, it is not needed as routine maintenance.
Q: Will resetting SMC erase my data?
No, it will not. The SMC reset affects only low‑level hardware settings. Your files, apps, and macOS remain completely untouched.
Q: My Mac is an Intel 2020 model. Which method do I use?
If it has a T2 chip (most 2020 Intel Macs do), use the T2 method with the right‑side keys. To check, go to Apple menu > About This Mac > System Report > Controller. If you see “Apple T2 chip,” use that method.
Q: SMC reset did not fix my Wi‑Fi. Should I do it again?
You can repeat the process once, but if it does not work after two attempts, the SMC is not the cause. Move on to other fixes like AWDL or router settings.
Q: My MacBook’s battery is not charging. Will SMC reset help?
Yes, battery charging issues are classic SMC symptoms. Try the reset. If it still does not charge, the battery or charging port may need hardware replacement.
Q: I have an Apple Silicon Mac. Why is this post relevant to me?
If you have an Apple Silicon Mac, you can skip the SMC reset entirely. However, the other Wi‑Fi fixes in the pillar post still apply to your machine. This cluster post is primarily written for Intel Mac owners.