What the SMC does
How to reset the SMC on a Mac that has the Apple T2 chip. Choose Apple menu Shut Down. After your Mac shuts down, press and hold its power button for 8 seconds. Release the power button, then wait a few seconds. Press the power button again to turn on your Mac.
The SMC is responsible for these and other low-level functions on Intel-based Mac computers:
- Responding to presses of the power button
- Responding to the display lid opening and closing on Mac notebooks
- Battery management
- Thermal management
- Sudden Motion Sensor (SMS)
- Ambient light sensing
- Keyboard backlighting
- Status indicator light (SIL) management
- Battery status indicator lights
- Selecting an external (instead of internal) video source for some iMac displays
How to know if you need to reset the SMC
These symptoms might mean that an SMC reset is necessary:
- Your computer's fans run at high speed, even though it isn't under heavy usage and is properly ventilated.
- The keyboard backlight behaves incorrectly.
- The status indicator light, if present, behaves incorrectly.
- Battery indicator lights, if present, behave incorrectly on Mac notebooks with a non-removable battery.
- The display backlight doesn't respond correctly to ambient light changes.
- Your Mac doesn't respond when you press the power button.
- Your Mac notebook doesn't respond properly when you close or open the lid.
- Your Mac sleeps or shuts down unexpectedly and you can't turn it back on.
- The battery doesn't charge properly.
- Your MacBook or MacBook Pro doesn't charge through its built-in USB-C port.
- Your MacBook or MacBook Pro doesn't recognize external devices that are connected to its built-in USB-C port.
- The MagSafe power adapter LED, if present, doesn't indicate the correct charging activity.
- Your Mac performs unusually slowly, even though its CPU isn't under an abnormally heavy load.
- A Mac that supports target display mode doesn't switch into or out of target display mode as expected, or it switches into or out of target display mode at unexpected times.
- The illumination around the I/O ports on a Mac Pro (Late 2013) doesn't turn on when you move the computer.
Manually Reset Wacom
Before you reset the SMC
Try each of these steps in this order before you reset the SMC. Test the issue after each step to see if the issue still occurs.
- If your Mac isn't responding, press and hold the power button until it shuts down. You'll lose unsaved work in any open applications. Then press the power button again to turn on your Mac.
- Press Command-Option*-Escape to force quit any application that's not responding.
- Put your Mac to sleep by choosing Apple () menu > Sleep. Wake the computer after it's gone to sleep.
- Restart your Mac by choosing Apple menu > Restart.
- Shut down your Mac by choosing Apple menu > Shut Down, then press the power button again to turn on your Mac.
If you're using a Mac notebook that's having power or battery issues, follow these steps:
How To Reset Mac For Sale
- Unplug the power adapter from your Mac and the electrical outlet for several seconds, then plug it back in.
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Remove and re-insert the battery if it's removable.
- Press the power button again to turn on your Mac.
If the issue still isn't resolved, you might need to reset the SMC using the steps below.
* On some keyboards, the Option key is also labeled Alt.
How to reset the SMC on Mac notebooks
If your Mac notebook has the Apple T2 Security Chip, skip ahead to the T2 section.
To reset the SMC on a Mac notebook, first determine whether the battery is removable. Most older Mac notebooks have removable batteries. Mac notebooks that have nonremovable batteries include MacBook Pro (Early 2009 and later), all models of MacBook Air, MacBook (Late 2009), and MacBook (Retina, 12-inch, Early 2015 and later). Learn more about Mac notebook batteries.
If the battery is nonremovable:
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds. If you have a MacBook Pro with Touch ID, the Touch ID button is also the power button.
- Release all keys.
- Press the power button again to turn on your Mac.
If the battery is removable:
- Shut down your Mac.
- Remove the battery. If you need help removing the battery, contact an Apple Authorized Service Provider or Apple Retail Store.
- Press and hold the power button for 5 seconds.
- Reinstall the battery.
- Press the power button again to turn on your Mac.
How to reset the SMC on Mac desktop computers
If your Mac desktop computer has the Apple T2 Security Chip, skip ahead to the T2 section.
Follow these steps for iMac, Mac mini, Mac Pro, and Xserve.
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Unplug the power cord.
- Wait 15 seconds.
- Plug the power cord back in.
- Wait 5 seconds, then press the power button again to turn on your Mac.
For Intel-based Xserve computers that aren't responding, you can shut down locally or by using remote commands. You can also press and hold the power button for 5 seconds.
How to reset the SMC on a Mac that has the Apple T2 Security Chip
Follow these instructions for Mac computers that have the Apple T2 Security Chip.
Mac desktop computers with the T2 chip
Try this first:
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Press and hold its power button for 10 seconds.
- Release the power button, then wait a few seconds.
- Press the power button again to turn on your Mac.
If that doesn't resolve the issue, follow these steps:
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Unplug the power cord.
- Wait 15 seconds.
- Plug the power cord back in.
- Wait 5 seconds, then press the power button again to turn on your Mac.
Mac notebook computers with the T2 chip
Try this first:
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Press and hold the power button for 10 seconds.
- Release the power button, then wait a few seconds.
- Press the power button again to turn on your Mac.
If that doesn't resolve the issue, follow these steps:
- Choose Apple menu > Shut Down and wait for your Mac to shut down.
- Press and hold the right Shift key, the left Option key, and the left Control key for 7 seconds. Your Mac might turn on and show the Apple logo on its display. Keep holding those keys while you also press and hold the power button for another 7 seconds. If your Mac turned on when you first pressed the keys, it turns off at this point.
- Release all three keys and the power button, then wait a few seconds.
- Press the power button again to turn on your Mac.
Learn more
Mac tools em700 manual. Resetting the SMC doesn't reset or otherwise change the contents of NVRAM or PRAM on Intel-based Mac models.
Need to restore Mac to factory settings? Then read on — our guide will help you learn the steps to factory reset MacBook Pro or any other Mac computer just as of it was new.
Note: This guide is relevant to Mac Pro, iMac, MacBook, MacBook Pro, and MacBook Air.
How to wipe MacBook Pro without losing data
When you reset Mac, all the information you have on your hard drive is wiped off. That’s why you need to create a backup to save your important files and data. This is like cloning your hard drive and keeping it for some time.
You can manually back up all your files and apps by copying everything to an external drive or iCloud. However, the faster and more secure way to back up your Mac is Time Machine — the Mac’s built-in software. It allows to recover individual files and restore your whole hard drive in the event of a catastrophe.
However, before you use Time Machine, make sure to clean up your Mac. You don’t want to back up all the junk it contains, do you? Plus, a backup will go faster and more smoothly if your Mac is not cluttered. For a quick cleanup, you can use a utility like CleanMyMac X. It will help you remove large and old files, useless apps, caches, and system junk in two clicks.
Here's how to clean GBs of junk in under 5 minutes:
- Download CleanMyMac X and launch it.
- Click Scan.
- Click Run.
Once you’ve cleaned up your Mac, enable Time Machine backups:
- Go to the Apple menu in the top left corner of your screen and choose System Preferences.
- Select Time Machine.
- Click the Select Backup Disk button.
- Choose the disk you’d like to use as a Time Machine backup, then click Use Disk.
- Check the Back Up Automatically box in order to back up your Mac to the chosen disk automatically.
That’s it!
Note that your first backup may take a long time, depending on how many files you have. But don’t skip this step — the backup will allow you to restore all your data should somethings goes wrong when you factory reset Mac.
The ultimate checklist before you reset MacBook Pro
Once your files are backed up, next be sure to disable any services that are associated with your system, including iTunes, iCloud, and iMessage, and deactivate programs on your Mac. Just take your time to sign out of everything to avoid those “after the sale” calls from a new user.
1. Deauthorize iTunes
Did you know, you can authorize up to 5 computers, which means that you can play your content just on 5 different Macs? That’s why you need to make sure your computer is not linked to your iTunes account when it gets a new owner. Don’t save this step for later.
Here’s how to sign out of iTunes:
- Open iTunes on your Mac.
- Click Account in the menu bar.
- Choose Authorizations > Deauthorize This Computer.
- Provide your Apple ID and password.
- Click Deauthorize.
2. Turn off FileVault
FileVault plays an important role on your Mac. It encrypts the data on your hard drive to prevent the unauthorized access to the information on your startup disk. However, since you’re going to restore MacBook to factory settings and wipe all the files, it’s better to turn off FileVault.
Follow the instructions:
- Go to the Apple menu > System Preferences.
- Choose Security & Privacy, then click FileVault.
- Click the lock icon to unlock it.
- Enter the administrator name and password.
- Choose Turn Off FileVault.
3. Disable iCloud
Sign out of iCloud to make sure that any remnants of the cloud data, such as bookmarks, notes, reminders, etc., are not visible to a new user.
Follow these steps to turn off iCloud:
- Choose Apple menu > System Preferences.
- Select iCloud.
- Click Sign Out.
- Confirm that you want to remove data from your Mac.
4. Sign out of iMessage
Before you restore Mac to factory settings, be sure to sign out of iMessage. Here’s how to do that:
- Open up Messages.
- Click Messages in the Menu bar in the top left corner of your screen.
- From the drop-down menu, choose Preferences.
- Select your iMessage account.
- Click on the Sign Out button.
As simple as that!
5. Erase Touch Bar Data
To ensure that all information is cleared from the Touch Bar, you need to erase its data. Follow these steps:
- Hold down the Command+R keys after pressing the power button to turn on your Mac or right after your Mac begins to restart.
- Choose Utilities > Terminal from the macOS Utilities window.
- Type this command in Terminal: xartutil --erase-all
- Press Return, type yes when asked if you are sure, and press Return again.
- Choose Terminal > Quit Terminal.
Step-by-step guide to reset Mac to factory settings
Once you’ve backed up your data and signed out of everything, you are ready to wipe your Mac and give it a fresh start with a new owner. The following steps will tell you how to restore Mac to factory settings.
Step 1: Restart Your Mac in Recovery Mode
This is pretty simple. Go to the Apple menu in the top left corner of your screen and choose Restart. As the system restarts, hold the combination of Command and R keys together — you’ll notice the Recovery Mode window.
Step 2: Erase Mac hard drive
- Choose Disk Utility in the Utilities window.
- Click on the Continue button.
- Choose your startup disk.
- Click Erase from the buttons at the top of the Disk Utilities window.
- Choose Mac OS Extended (Journaled) from the menu.
- Click Erase.
When the process is complete, go the Disk Utility menu in the top left corner of your screen and select Quit Disk Utility.
Step 3: Reinstall your operating system
Congratulations, you’ve reformatted your hard drive and now you can reinstall a clean Mac operating system. Simply click Reinstall macOS or Reinstall OS X. Confirm that you really want to do it and follow the instructions you’ll see on the screen.
However, if you are not going to keep your Mac, it would be better to quit the process and let the new owner enter all necessary information. Simply hold down the Command and Q keys and then choose Shut Down to turn the Mac off but leave it waiting for a new user.
That’s all. Now your Mac is clean and ready for a fresh start.
Mac 5000 ekg machine manual. The MAC 5000 system should not be used adjacent to or stacked with other equipment and that if adjacent to or stacked use is necessary, the MAC 5000 system should be observed to verify normal operation in the configuration in which it will be used. View and Download GE MAC 5000 operator's manual online. Resting ecg analysis system. MAC 5000 Medical Equipment pdf manual download. GE MAC 5000 Operator's Manual. Resting ecg analysis system. Select Fax machine to transmit to facsimile machine. Use IR for Select Yes to enable the local infrared serial line communication.
We hope this guide was helpful and you got all useful information on how to reset MacBook to factory settings. Stay tuned for updates!