TL;DR:
Apple silicon Macs automatically reset their SMC during a normal power cycle and do not require manual NVRAM resets, whereas Intel Macs require specific hardware-dependent keyboard shortcuts tailored to the exact symptom you are experiencing.
● To resolve startup disk, display resolution, or volume issues on an Intel Mac, manually reset the NVRAM or PRAM by turning on the machine and immediately holding Option + Command + P + R for approximately 20 seconds.
● To resolve unusual power, charging, or fan behavior on an Intel Mac, perform an SMC reset based on the hardware: T2 notebooks use a specific two-stage key sequence, non-T2 notebooks require holding left Shift + left Control + left Option + power for 10 seconds, and desktops require unplugging the power cord for 15 seconds.
● Neither reset procedure will delete your personal files, and Apple explicitly notes that performing an SMC reset on an Intel Mac does not automatically reset its NVRAM or PRAM.
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An NVRAM reset, PRAM reset, and SMC reset are not the same procedure, and the correct steps depend on whether your Mac uses Apple silicon or an Intel processor. On an Intel Mac, you can manually reset NVRAM with Option + Command + P + R, and some Intel Macs also have an SMC reset procedure. On Apple silicon Macs, Apple says the manual NVRAM shortcut does not apply, while the SMC resets automatically when you restart or shut down and power the Mac back on.
That distinction matters for searches such as MacBook Pro SMC reset, MacBook Air NVRAM reset, iMac PRAM reset, or reset NVRAM MacBook M1. Before pressing any key combination, identify the Mac type and match the reset to the symptom. The current procedures below follow Apple's published guidance rather than older one-size-fits-all instructions.
In This Article
Part 1. NVRAM, PRAM, and SMC: Which Reset Does Your Mac Need?
Before you reset anything, separate the two types of troubleshooting. NVRAM or PRAM deals with a small set of startup-related settings, while the SMC is tied to low-level power and hardware behavior on Intel Macs.
What Are NVRAM and PRAM?
NVRAM is a small amount of memory that stores certain settings even when a Mac is powered off. Apple currently lists settings such as sound volume, display resolution, startup disk selection, and time zone. Apple also refers to NVRAM as PRAM in its support documentation, so searches for reset PRAM, Mac PRAM, and NVRAM PRAM reset generally point to the same Intel Mac startup-key procedure.
The important limitation is architecture: Apple's current NVRAM reset guidance states that the manual reset steps apply to Intel-based Macs and are not needed on Apple silicon.
What Does the SMC Control?
The System Management Controller, or SMC, manages low-level hardware functions on Intel Macs. Apple lists areas such as the power button, battery and charging, USB port power, fans, lid behavior, sensors, and status lights. An SMC reset is therefore more relevant to unusual power, charging, fan, thermal, camera, or hardware-control behavior than to ordinary app errors.
Apple also explicitly notes that resetting the SMC does not reset NVRAM or PRAM. That is why the two procedures should be chosen separately instead of automatically being treated as one combined reset.
Identify Apple Silicon, Intel T2, or Intel Non-T2 First
The same MacBook Pro, MacBook Air, iMac, Mac mini, or Mac Pro family name can include different hardware generations, so identify the architecture before following a reset procedure.
| Mac Type | How to Identify It | NVRAM / PRAM | SMC |
| Apple silicon | About This Mac shows Chip followed by Apple M-series or another Apple chip. | No manual Option-Command-P-R reset is needed. | Restarts automatically when the Mac restarts or shuts down and powers on. |
| Intel with Apple T2 Security Chip | System Information can show Apple T2 chip under Controller or iBridge. | Use Option-Command-P-R during startup. | Use the T2-specific notebook sequence, or the desktop power-disconnect sequence. |
| Intel without T2 | About This Mac shows an Intel processor, and no T2 appears in System Information. | Use Option-Command-P-R during startup. | Use the non-T2 notebook sequence, or the desktop power-disconnect sequence. |
For a T2 check, hold Option while choosing Apple menu > System Information, then select Controller or iBridge in the sidebar. Apple's current T2 identification page lists the affected Intel models.
Part 2. How to Reset NVRAM or PRAM on Mac
Once you have confirmed that the Mac is Intel-based, the NVRAM or PRAM reset itself is short. The same Apple key combination applies across Intel MacBook Pro, MacBook Air, iMac, Mac mini, and Mac Pro models.
Reset NVRAM or PRAM on an Intel Mac
Use this method when an Intel Mac has a problem with one of the settings NVRAM stores, such as startup disk selection, display resolution, sound volume, or time zone.
Step 1. Shut down the Mac.
Wait until the Mac is fully powered off before starting the keyboard shortcut.
Step 2. Turn on the Mac and immediately hold the NVRAM keys.
Press and hold Option + Command + P + R as soon as the Mac starts.
Step 3. Keep holding the keys for about 20 seconds.
Your Mac may appear to restart while you are holding the keys. Release them after approximately 20 seconds, following Apple's current instructions.
Step 4. Let the Mac start normally and recheck the affected setting.
You may need to reselect a startup disk or readjust other NVRAM-stored settings afterward.
Note: If the startup shortcut is not recognized, Apple recommends checking its startup key combination guidance. A wired or built-in keyboard can be more reliable during startup, and a firmware password can prevent some startup key combinations from working.
Can You Reset NVRAM on an M1 or Other Apple Silicon Mac?
No manual NVRAM reset shortcut is required on an Apple silicon Mac. Apple specifically says that the Option-Command-P-R procedure does not apply to Apple silicon and is not needed there.
If you searched for reset NVRAM MacBook M1, MacBook Air NVRAM reset, or a similar Apple silicon query, do not keep retrying the Intel key combination. Instead, restart the Mac normally and troubleshoot the actual symptom. You can confirm Apple silicon in About This Mac because the window shows a Chip field rather than an Intel Processor field. Apple's current Apple silicon identification guide covers the supported Mac families.
Part 3. How to Reset the SMC on Mac
SMC reset steps vary more than NVRAM steps, so match the procedure to Apple silicon, an Intel notebook with T2, an Intel notebook without T2, or an Intel desktop Mac. Apple's current SMC reset documentation is the authority for these sequences.
Reset the SMC on an Apple Silicon Mac
Apple silicon Macs do not use the Intel SMC key combinations. Apple says the SMC resets automatically when an Apple silicon Mac restarts or shuts down and then powers on.
Step 1. Connect the Mac to power when practical.
This is especially useful when the symptom involves charging or power behavior.
Step 2. Restart the Mac.
Choose Apple menu > Restart. Alternatively, choose Shut Down, wait for the Mac to power off, and press the power button to turn it back on.
Step 3. Recheck the original symptom.
If the problem remains, move to symptom-specific diagnostics rather than trying Intel reset shortcuts on Apple silicon.
Reset the SMC on an Intel MacBook With the T2 Chip
For an Intel MacBook Pro or MacBook Air with the Apple T2 Security Chip, Apple provides a two-stage process: try a power-button reset first, then use the full key sequence if the problem remains.
Step 1. Shut down the Mac.
With the Mac off, press and hold the power button for 10 seconds, then release it. Wait a few seconds and press the power button normally.
Step 2. If the issue persists, shut down again.
On the built-in keyboard, hold left Control + left Option + right Shift for 7 seconds.
Step 3. Add the power button.
Without releasing the three keys, also press and hold the power button for another 7 seconds.
Step 4. Release all keys and restart.
Wait a few seconds, then press the power button to turn on the Mac.
Reset the SMC on an Intel MacBook Without the T2 Chip
If your Intel MacBook does not have the T2 chip, the notebook SMC sequence is different and uses three keys on the left side of the keyboard.
Step 1. Shut down the MacBook.
Disconnect unnecessary accessories so you can test the Mac itself after the reset.
Step 2. Hold the SMC key combination.
Press and hold left Shift + left Control + left Option + power at the same time for 10 seconds.
Step 3. Release the keys and turn on the Mac.
Press the power button normally, then check whether the original charging, fan, power, or hardware-control symptom has changed.
Reset the SMC on an Intel Desktop Mac
For Intel desktop Macs, including compatible iMac, Mac mini, and Mac Pro models, Apple's current power-disconnect sequence is the same whether or not the Mac has the T2 chip.
Step 1. Shut down the Mac.
Wait until it has fully powered off.
Step 2. Unplug the power cord.
Leave the Mac disconnected from power for 15 seconds.
Step 3. Reconnect power and wait.
Plug the power cord back in, wait 5 seconds, and then press the power button to turn on the Mac. The exact position of the power connector varies by model.
Part 4. Should You Reset SMC and NVRAM Together?
You do not need to reset SMC and NVRAM together by default. Choose the reset that matches the symptom, and remember that Apple says an SMC reset does not affect NVRAM or PRAM.
| Symptom or Goal | Reset to Consider | Important Limit |
| Wrong startup disk, display resolution, sound volume, or time zone | NVRAM / PRAM reset | Manual reset is for Intel Macs, not Apple silicon. |
| Unusual charging, power-button, fan, USB-power, lid, sensor, or indicator behavior | SMC reset | Manual key sequence is for Intel Macs; Apple silicon resets this automatically on restart or shutdown/power-on. |
| Both groups of symptoms on an Intel Mac | Run the appropriate resets separately | Do not assume every performance or app problem is caused by NVRAM or SMC. |
| General app crash, browser problem, or ordinary slow performance | Neither as a first-line fix | Troubleshoot the affected app or macOS behavior directly. |
This distinction prevents an old habit of treating PRAM and SMC reset as a universal Mac repair. These resets target a narrow set of settings and hardware-control behaviors; they do not repair damaged storage, reinstall macOS, or fix every startup issue.
Part 5. What to Do If the Reset Does Not Fix the Problem
If an NVRAM or SMC reset changes nothing, use the symptom itself to decide what comes next rather than repeating the reset indefinitely.
| What Still Happens | Safer Next Step |
| Mac will not turn on | Check power and accessories first. Apple recommends holding the power button for about 10 seconds and disconnecting nonessential accessories before escalating. |
| Fans, charging, camera, or other hardware behavior remains abnormal | Use Apple Diagnostics or Apple Support to check for a hardware issue instead of repeatedly resetting the SMC. |
| NVRAM settings reset again every time a desktop Mac is unplugged | Apple notes that service may be needed for the small battery that preserves NVRAM settings on some desktop Macs. |
| Mac is stuck at a startup screen | Troubleshoot that startup symptom directly; do not assume another NVRAM or SMC reset will fix a disk, macOS, or hardware problem. |
For a Mac that will not power on, Apple's current Mac power troubleshooting guidance also makes the architecture distinction clear: SMC reset is an Intel-era troubleshooting step and is not required on Apple silicon.
Part 6. Does Resetting SMC or NVRAM Delete Data?
No. Apple's NVRAM and SMC reset procedures are settings or hardware-control resets; they do not erase the files stored on your Mac. An NVRAM reset can change settings such as startup disk selection, display resolution, sound volume, or time zone, but it is not a storage erase. An SMC reset also does not reset NVRAM or PRAM.
If files are missing at the same time as a startup or hardware problem, treat that as a separate data-loss issue rather than assuming the reset deleted them. Check Trash, iCloud Drive, Time Machine, and other backups first. If a local file was actually deleted and the source storage is still detectable, Recoverit Mac file recovery can be considered for a logical recovery case. Stop writing new data to the source volume, save recovered files to a different healthy location, and do not expect software recovery to succeed after data has been overwritten. An undetectable drive, repeated disconnects, unusual noises, liquid damage, or other physical symptoms are reasons to stop DIY scanning and seek professional help.
Conclusion
For a current Mac, the first question is not simply “How do I reset PRAM?” but “Is this Apple silicon or Intel, and which reset actually matches the symptom?” Intel Macs still use the Option-Command-P-R NVRAM shortcut, while Intel SMC steps depend on T2 and notebook-versus-desktop hardware. Apple silicon Macs do not need the manual NVRAM shortcut or an Intel-style SMC key combination. Using the architecture-specific procedure keeps troubleshooting accurate and avoids relying on obsolete Mac reset instructions.
FAQ
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How do I reset PRAM and NVRAM on a MacBook Pro?
On an Intel MacBook Pro, shut down the Mac, turn it on, and immediately hold Option + Command + P + R for about 20 seconds. On an Apple silicon MacBook Pro, Apple says this manual NVRAM reset is not needed. -
How do I reset NVRAM on a MacBook Air?
If the MacBook Air is Intel-based, use Option + Command + P + R during startup for about 20 seconds. If it has Apple silicon, including M1 or later Apple chips, the Intel shortcut does not apply. -
How do I reset the SMC on a MacBook Pro?
First identify whether the MacBook Pro has Apple silicon, an Intel processor with the T2 chip, or Intel without T2. Apple silicon requires only a normal restart or shutdown/power-on for SMC reset behavior; Intel notebooks use model-specific key combinations. -
Can I reset NVRAM on an M1 Mac?
There is no manual Option-Command-P-R NVRAM reset procedure for M1 or other Apple silicon Macs. Apple says the Intel NVRAM reset steps do not apply and are not needed on Apple silicon. -
Should I reset SMC and NVRAM at the same time?
Not automatically. Use NVRAM reset for the Intel Mac settings Apple associates with NVRAM, and use SMC reset for relevant Intel power or hardware-control symptoms. Apple states that resetting the SMC does not reset NVRAM or PRAM. -
Does resetting PRAM, NVRAM, or SMC erase files?
No. These reset procedures do not erase normal files from Mac storage. NVRAM can reset certain system settings, while SMC reset affects low-level hardware-control behavior on supported Intel Macs.
