To restart your Mac in Safe Mode, begin with your Mac switched off or restart it. 1) As soon as your Mac switches on and lights up, press and hold the Shift key. 2) Release the Shift key as soon as the login window appears. That’s it, your Mac has now been booted in safe mode. To get into Safe Mode you simply restart your Mac with the Shift key held; however, in some cases this will not work and the computer may simply boot normally or experience a problem and hang.
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Reasons to start your Mac in Safe Mode
Mac's Safe Mode minimizes the applications you have available on your Mac to help identify where any issues might be coming from. Starting up your computer and making it run in Safe Mode is also known as a safe boot (safe boot is how your Mac starts, Safe Mode is how it runs).
Booting in Safe Mode doesn’t just restrict your applications: A safe boot also checks through your startup drive to make sure there are no problems there.
A fault in your system (like corrupted boot sector) might be preventing you from using your Mac at all. By booting in Safe Mode, your Mac can work with macOS core processes to get back into the system and identify problems, such as floating extensions or rogue applications, that you can then remove.
What happens in Safe Mode
When your computer is prompted to perform a safe boot, it will perform a number of tasks before you can use it, which include:
- A directory check of the startup drive;
- Running on only the bare minimum of necessary kernel extensions;
- Disabling all startup or login applications;
- Deleting the dynamic loader cache, which can help fix blue screen freeze on startup (OS X 10.5.6 or later);
- Disabling all fonts that are not supplied by Apple and moving all font caches to the Trash.
Troubleshooting in Safe Mode
Once your Mac is running in Safe Mode, some applications will no longer be available. If your Mac is working fine in Safe Mode, then it’s likely that one of the restricted applications is responsible for the issues. You can manage the list of startup applications manually, removing the potential buggy apps one at a time to see if it affects the performance.
Open Apple Menu > System Preferences
Click Users & Groups icon
Choose your username, then click Login items
Use [-] sign to remove startup items
There is still a problem though. Manually deleting problem applications still leaves their traces deep in the system, so it’s best to use a dedicated Mac cleanup software like CleanMyMac X to double check your Mac is clear of any problematic files.
If your Mac continues to run into difficulties even in Safe Mode, you may need to use Mac’s native recovery tool, Disk Utility.
Identifying the problem
Here is a list of most common system issues Mac users encounter when their Mac isn’t running at peak performance:
- Corrupted startup files or login applications
- Software conflicts
- Damaged hardware
- Too many apps running, or too much junk cluttering up your disk
To diagnose your Mac more precisely, we recommend performing a full scan with some dedicated Mac cleaning app. As described above, CleanMyMac is our favorite (you can download this app here for free). This app made by the guys from MacPaw sports a handy Dashboard, with hardware health monitors among others, which should give you a clue as to what’s wrong with your system.
How to start your Mac in Safe Mode
To restart your Mac in Safe Mode, begin with your Mac switched off or restart it.
1) As soon as your Mac switches on and lights up, press and hold the Shift key.
2) Release the Shift key as soon as the login window appears.
That’s it, your Mac has now been booted in safe mode. Note that it may take longer than usual to boot your computer: This is because there are several checks being performed before it’s ready to use.
If you don’t trust your Mac to turn off and on again without further complications, or for some other reason you would prefer not to safe boot from the startup screen, there is an alternative using the Terminal application.
1) Locate Terminal: Applications > Utilities > Terminal.
2) In the Terminal command line, type the following code and then press Enter:
sudo nvram boot –arg=”-x”
3) You will be asked to enter your password to authorize.
4) Your Mac will now reboot in safe mode. You will not have to hold the Shift key when the computer restarts, simply log in when prompted.
Running your Mac in Safe Mode
If you’re not sure whether your safe boot was successful, there are a couple of ways you can check.
‘Safe Mode’ will appear in red in the menu bar
The boot mode will be listed as ‘Safe Mode’ (instead of ‘Normal’). To find your boot mode, click on the Apple logo in the menu (top left) and select This Mac. Choose System Report, then Software, and from there you will be able to see whether you are in normal or safe mode.
Your performance speed will change. Typically macOS will run slower when it is in Safe Mode due to the reduced processes, but if you have noticed some serious lagging this may be improved by the faulty applications being restricted.
Working in Safe Mode
Running your macOS in Safe Mode is normally used to troubleshoot glitches that you have noticed, such as lag, crashing, or spontaneous closures of applications. You should try to use your Mac as you normally do so that you can see if the issues have disappeared in Safe Mode or are still there.
You will find that some features aren’t available, such as third-party fonts, the DVD player, and audio in/out devices, which may limit how productive you can be, so it’s best to identify the fault in Safe Mode, fix it, and return to normal mode to work as usual.
Exiting Safe Mode
Once you’re finished in Safe Mode, simply restart your Mac. It should then reboot as normal, hopefully with improved performance.
If you’re using Terminal commands to return to normal, type
sudo nvram boot-args='
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It may take a little longer than usual to shut down from safe mode, but don’t become impatient and use the power button to force a hard shut down.
Booting in Safe Mode Unprompted
If your Mac automatically enters Safe Mode itself without you pressing shift or using the Terminal, don’t panic. Your Mac may have detected an issue that it thinks needs repairing in Safe Mode. If this happens only once, then great, your Mac did its job and cleaned up the issue before it could cause any more problems.
If your Mac is stuck restarting in a Safe Mode loop, try entering another startup configuration, the Recovery Mode, by pressing Command (?) + R upon startup. This will perform a Disk Utility scan to check for issues, and, if that doesn’t work and you have backed up your files, you can try a reinstalling a clean copy of macOS to start fresh.
Tip: Check your keyboard is clean and that there is no debris beneath the keys. If the shift key has become stuck, your Mac will think it’s being pressed during startup to initiate a safe boot.
Safe Mode limitations
Unfortunately, the responsibility to locate software issues still resides with the user in Safe Mode. A safe boot will check for disk problems, but if it fails to turn anything up you may be resigned to shifting through your applications list to see what might be causing the problem.
Luckily, some helpful maintenance utilities can be run while in Safe Mode. CleanMyMac X is one of those so check it out. It clears through your junk before it can impact on your system, but if your macOS is starting to lag it might be time to perform a full clean-out of those unused applications. With an average of 62GB of junk cleaned from an average Mac, it's maybe just the tool you need to put your Mac back on track.
Dec 21, 2020 • Filed to: Solve Mac Problems • Proven solutions
Recovery Mode in OS X provides a set of solutions for users to utilize when users need to repair and reinstall their operating system in an emergency. You can also reset the Mac password using recovery mode if needed. There are several ways to boot Mac into recovery mode. If you find one method overwhelming, there are several other alternatives you can use. We will walk you through the different ways on how to boot Mac into recovery mode so that they will become undoubtedly useful in a rare emergency.
Part 1: How to Boot Mac in Internet Recovery Mode
Along with the introduction of a locally stored recovery volume, Apple introduced its Internet Recovery service that allows your operating system to download contents of the recovery hard disk partition from the company's service. This option is great to use when your local drive is completely corrupted and you no longer can access locally-stored recovery tools.
To launch Internet Recovery, make sure your Mac is connected to a WiFi network and follow the steps below:
- Reboot your Mac.
- Hold the 'Options', 'Command', and 'R' buttons until the boot chimes are triggered.
- Wait until the system finished downloading the recovery tools from Apple's website.
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It is noted that you are unable to boot Mac into Recovery Mode if you are using devices older than the ones below:
- MacBook Pro (13-inch, Early 2011)
- MacBook Pro (15-inch, Early 2011)
- MacBook Pro (17-inch, Early 2011)
- iMac (21.5-inch, Mid 2011)
- iMac (27-inch, Mid 2011)
- MacBook (13-inch, Mid 2010)
- MacBook Pro (13-inch, Mid 2010)
- Mac mini (Mid 2010)
- MacBook Pro (15-inch and 17-inch, Mid 2010)
- iMac (21.5-inch and 27-inch, Mid 2010)
- MacBook Air (11-inch and 13-inch, Late 2010)
Part 2: How to Create a bootable drive into Recovery Mode
You can create a bootable drive to store an OS X Recovery Disk so that you can access recovery tools anytime, anywhere. It would be great if you could invest in a high-capacity USB 3.0 flash drive to store the required tools.
There are plenty of articles outlining how you can create a bootable OS X Recovery Disk, including ours. Once you have this established, you can follow these steps to get your Mac into Recovery Mode:
- Reboot your Mac.
- Hold down 'Option' on your keyboard once you hear the chime sound.
- Attach your bootable OS X Recovery Disk to your Mac and select it from the prompt list.
- Your Mac will launch into Recovery Mode and you can start fixing your Mac.
As you can see, there are plenty of methods you can use to boot Mac into Recovery Mode. There is no need to panic when you find yourself in trouble - just choose and master the method that seems least intimidating to you and you will be well on your way. After you boot Mac into Recovery Mode, you can also restore your data on Mac.
Part 3: How to Boot Mac with Installation Disk
If you are using an older Mac, it probably comes with a grey recovery DVD that you can use to run recovery routines. If you had bought a copy of a newer operating system, you can also use the installation disk to perform recovery.
It is the easiest way to go into Recovery Mode and here is how you can do it:
- Insert the grey DVD and reboot your Mac.
- Hold down 'C' on your keyboard until you hear the boot chimes.
The recovery tool will take some time to load. Follow the wizard that will put your Mac into Recovery Mode.
Part 4: How to Boot Mac into Recovery Mode with Local Recovery
- Reboot your Mac.
- Hold the 'Command' and 'R' buttons until the boot chimes are triggered.
- You will see the OS X utility window that will prompt you to choose one of the four options.
Part 5: How to Boot Mac into Recovery Mode from Time Machine
It is really important to keep backups of your machine and Apple facilitates this with its Time Machine feature. It would be best to store your backup on an external drive so that you can initiate Recovery Mode using this when your hard drive is wiped out.
Follow these steps to boot Mac into Recovery Mode:
- Reboot your Mac.
- Hold down the Option button when the startup chimes sound.
- Connect your Time Machine drive. It will take some time for the system to detect the drive. You might need to key in your password.
- Choose the drive to launch your Mac into Recovery Mode.
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