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Reinstall from macOS Recovery
5) Click the Erase tab as shown in the image above. 6) In the erase tab you will see the Format section. Next to this option is the dropdown from where you can choose how you wish to format the drive. For instance, if you wish to use the drive only for one of the Mac OS versions, select Mac OS Extended. Jul 12, 2018 The Secure Erase Free Space feature in Disk Utility on your Mac added a layer of privacy and security to file deletion. The feature allowed you to overwrite the free space on a drive to prevent. Jun 16, 2020 Accidentally Erased Hard Drive on Mac. You may use Disk Utility application to perform hard drive partition-related tasks on Mac Operating System, such as to format, repair, erase or create hard drive partitions and end up with an erased hard drive. Moreover, by doing so, crucial data may be deleted by mistake from your Mac. AweEraser for Mac is secure and certified Mac data erasure software which offers secure and flexible data erasure for individuals, enterprises and organizations. With certified data erasure algorithms, it will permanently erase your sensitive data before you sell, donate, lend, give away or dispose your Mac/hard drive/digital device.
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.
1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen. https://plannerever406.weebly.com/how-to-download-fl-studio-to-mac.html.
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).
Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. How to download football manager 2019 on mac. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
If your Mac restarts to a setup assistant, but you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might vary in some cases:
- If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
- If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
- If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
- If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
Other ways to install macOS
- You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
- Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.
Before you hand over your laptop or an old hard drive to a friend or a stranger, you have to be very careful and beware. When you delete a file or data from your drive, it’s not really gone. Your system marks that occupied space as free space now and you can recover those deleted files on your Mac. Generally new data overwrite that space making the deleted data harder to find. So you have to make sure that all personal and important are cleaned off. Formatting won’t help you in this case. Instead you have to securely wipe the hard drive.This guide will tell you how to securely wipe a hard drive on your Mac.
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Why you need to wipe a hard drive?
Wiping your hard drive data is necessary as it may be recovered by it’s new user and that person can use that data to harm you. Some things such as identity theft, credit-card fraud, bank fraud, hacking, your auto save passwords, emails, browsing history and personal content can be used to blackmail you or commit crime in your name. So it is advisable to erase your hard drive to reduce the risks.
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How to Securely Erase Data from Your Mac and External Drives?
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You can use Disk Utility to securely erase hard drive in mac or an external hard drive. All you have to do is follow the steps given below:
1.Wiping your hard drive will erase everything. So it’s better to back-up your data in an external source before wiping your drive.
2.Open the apple menu and restart your computer. Then wait for your mac to restart.
3.After the system restarts press and hold the Command+R keys.
4.Hold the Command+R keys until you see the Apple logo.
5.After that a window named “OS X Utilities” pops up.
6.Click on the Disc Utility option as shown in the image below and click on continue.
7.Select the hard drive you want to erase from the available drives list in the left column.
8.You have to be very careful at this moment. Make sure you select only hard drives and not partition.
9.Once you have selected your drive, click on ‘Erase’ button.
10.After doing so the system will ask you to name the hard drive after erasing it and how you want to format the drive. The default settings are preferable.
11.Then select the ‘Security Option’ button.
12.A window will pop up asking you how you want to erase your drive. Fastest way is the default. Adjust the slider and select the option which you want. You can choose from the following options.
(a)Fastest (Least preferred): This option doesn’t erase your drive securely and a disc recovery application may be able to recover the files.
(b)Option 2: It erases the information used to use your files and writes over the data two times.
(c)Option 3: It erases the information used to use your files and writes over the data 3 times.
(d)Most secure: It erases the information used to get access to your files and writes over the data 7 times.
As the option 1(fastest) is least secure it is foolish to choose it. Option 4 is most secure but it will take a lot of time. So I suggest you to choose from Option 2 or Option 3 depending how securely you want to wipe it out.
This method works for all hard drive (internal or external). But if you want to erase your startup drive you have to boot your computer from an external source. You can use Diskmaker X to create a bootable external source.
How to Securely Erase a Mac SSD or a flash drive?
Solid state drives or flash drive stores data differently. So using Disc Utility is a bad choice. It may affect your drive memory cells or affect it’s performance. There is a simple way to erase your SSD by using FileVault 2 . In FileVault 2 the full-disk encryption (FDE) option keeps your startup drive encrypted all times. When you boots your system with a FileVault encrypted account, OS X encrypts everything written to disk.
You can erase the File Vault encrypted drive using Disc Utility. Helicopter simulator mac free download. But before erasing the system will ask you to unlock the drive. To unlock the drive you need to enter the password for the FileVault enabled account. If successful, disc will be unlocked and erased.
Erasing a File Vault encrypted drive will make the drive data irrecoverable.
What if you can’t access the hard drive?
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If you cannot access the drive then Disc Utility won’t help you in this case. Professional data recovery companies may help you in this case. Hard drive platters can be extracted from the drive enclosure and read out using specialized equipment. So smashing or breaking your hard drive is your best option.
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Conclusion
You can use FileVault,Disk Utility and Mac Washing Machine to encrypt and erase your startup or external hard drive.You can always hire a professional service.After wiping your mac hard drive you can wave it goodbye.