Clean installation of Mac OS without data loss. Installing Mac OS on a MacBook Reinstalling mac os from scratch

MAC OS, like Windows, sometimes requires reinstallation. This may be due to your MAC device being slow or due to it being sold (I don't think you'll be happy with a MAC being sold with your personal information on it). Or, on the contrary, buying a MACBOOK (PRO, AIR) or iMAC with a bunch of incomprehensible files or unnecessary programs. In general, there can be many reasons to reinstall MAC OS. In this article I will describe in detail how to reinstall MAC OS and get a “clean” operating system.

We'll go over the basic steps. Once the download is complete, do not start the installation yet. Section "Determining the compatibility of your printer's operating system." Recommendations for installing or updating software. Use a wireless or network connection.

Network usage. Please next to the products described in this article to speed up the support process and reduce callback situations. There are several options with a remote partition. We have instructions. Once the installation is complete, it will reboot and place the installer in your Applications folder.

So, before you start, you need to transfer all the necessary information to external media, since after reinstalling MAC OS, it will be almost impossible to restore anything.

In order to reinstall MAC OS you will need:

1 MACBOOK (PRO, AIR) or iMAC connected to a power source;

2 Internet access from MACBOOK (PRO, AIR) or iMAC;

What if I lose important data in the process?

We've put together a list of questions we frequently ask, along with answers and column links: to see if your question is covered. If not, we're always looking for new problems to solve! Send messages via email, including screens if necessary.

If you are a beginner, it is not recommended for you to take this tutorial. You should have enough on your drive, so either remove some cracks or move some of your old data to a separate external archive hard drive. The textbook you are about to read consists of six main sections.

3 This article and about an hour of time.

To reinstall MAC OS using the method described below, you must be using OS 10.7 or higher (10.8, 10.9). In order to check what version of the operating system you have installed, click on the apple in the upper left corner and select "About this MAC". The window that opens will contain information about the installed version of MAC OS.

Installation may take a little time, but it is by no means difficult. Check out our full video inside for details. Note. This is always a good idea when you change the partition table. Step 10: The installation process will now begin. The installation process will only take a few minutes. Step 11: You will see a blue screen Quick Transition. If additional driver installation windows appear, be sure to install them. This next step is very important because it updates the latest audio driver.

The initial driver is known to cause problems with the speaker, so it is important to update. You have two choices. Your mileage may vary depending on internet speed. And all applications are stored in the Applications folder. Drag the app to your Applications folder. Your application is now installed. Delete the downloaded file once you're done.

IMPORTANT!!! The following steps will delete all data on your drive, so you need to be sure that the necessary files are not on the MAC.

Then select the disk with the system, open the “Erase” tab on the right and click the “Erase” button.

Confirm deletion by clicking the "Erase" button.

If you perform a custom installation and deselect the software contained on discs 2 and 3, you will not be prompted to insert those discs. You need to install it separately. See "Note: Developer Software," in Chapter 2 for more information about obtaining and installing this software. As the first step of the installation process, the installer asks for your preferred language. Once you select it, you'll see the text "Preparing to Install," followed by the launch and appearance of the Installer's Introduction panel.

After that, close the Disk Utility window and select Reinstall MAC OS.

After this, confirm the installation, click the "Continue" button. With the release of the new OS X 10.10, OS X Yosemite will be installed.

Before going any further, take a look at the menus available in the installer utility. Some of them provide options of particular interest. You can now install the software. The safest bet is to start with the disc. Only one command is important in this menu.

Reinstalling Mac OS X Yosemite

Your choices: “Reboot”, “Run disk” and “Do not exit”. The File menu also only contains one important command. You won't be able to select this command from the installer's initial screen; instead, you can access it later - exactly when will depend on the installation you're doing. The command will likely be active by the time the Select Destination window appears and, of course, no later than after the installation is complete.

• Chapter 8, for more information about the network utility.
• Chapter 10, as well as many other places throughout the book, to cover the Terminal.

Partitioning a hard drive means dividing it into two or more separate volumes.

After the installation is complete, you will receive a “clean” MAC OS operating system; all that remains is to set some settings.

The next step is to select the country where you plan to use MACBOOK (PRO, AIR) or iMAC.

Select your keyboard layout.

In most cases, volumes behave the same as if you had two separate hard drives. The only time you will see that only one hard drive is working is when the hard drive fails, or if you need to reformat it. So, if you want two or more partitions, you must create them yourself.

There won't be a backup because you haven't used it yet, which means the process will be greatly simplified. Even if you don't want the second partition to boot, you can still use it to store backups of important personal files that are stored in the first partition.

You can connect to a Wi-Fi network (you can skip this step if you wish).

If you want to restore data made earlier using Time Machine or from a Windows computer, select the appropriate option; if you do not plan to restore anything, select “Do not transfer any information” and click “Continue.” The data that you transferred to external storage can be transferred later.

The best and safest backup option is to move or copy these items to another drive altogether, not just another partition of the same drive. If for some reason the drive fails completely, the failure could affect both partitions. In either case, you can erase one partition without erasing any others. With two partitions, you can wipe the boot partition without losing the second partition.

Below are some general instructions for dividing a disk into two partitions. Remember: this will delete all existing data for any and all existing partitions for that drive. So, when choosing a partition size, make sure that you will have at least a few gigabytes of unused space after the installation is complete. This will not result in a bootable partition. . Separation without erasing. Always back up your drive before using one of these utilities, in case something goes wrong.

The next step is to sign in with your Apple ID. In this example I won't do that.

Then read the license agreement and accept it.

After this, provide your credentials (username and password) and click “Continue.”

Where are the utilities located on the installation disk? When you select one of these applications from the Utilities menu, the installer launches a copy of the utility found there. The Window menu contains one final note. If you do happen to be traveling through a show stop error, you will almost certainly be warned about it directly using an alert in the installer window. In other words, you don't need to check the log. However, the log may be useful as a diagnostic tool if a problem occurs that does not cause another explanatory message to appear.

The last step is to register your MAC (this step is optional).

And in the end you will get a "clean" MAC OS.

Video of reinstalling the MAC OS operating system on iMAC/MACBOOK PRO/AIR.

For example, it can alert you to check for firmware updates. You have completed the introduction. The following is the license area that provides the Software License Agreement for the software you are about to install. Agree to the terms and then move on.

In this area, you will see an icon for each installed volume. For example, one of the problems may be that there is not enough free disk space. A dialog box will appear providing the following installation options. However, in some cases, such as if there is not enough disk space for the update, this option will be grayed out and you will have to select one of the remaining two. In fact, you can use it instead of updating to prevent potential problems. One exception: third-party software in the original Applications folder is not moved to the Legacy Systems folder; Instead, it is moved to your new Applications folder. When you first archive and install, all software you move is placed in a folder named "Previous System 1" in the Previous Systems folder. If you repeat this process, the previous system 2 will be created and used, etc. this process also moves the developer folder to previous systems. About the only reason you wouldn't choose would be if you thought files in your home directory were causing a problem that you didn't want to carry over to a new installation. It can also save third-party software that cannot be saved using standard archive and installation. This option does not save all system settings, only most of them. For example, it does not save the following: settings related to the use of the network time server; list of configured printers; your computer's time zone, your display resolution, and other settings if you have more than one display connected, such as location, and sharing preferences panel settings. Most of this is minor and can be easily discarded if lost. Note: If you move past the Select Destination area and then use the Back button to return, the Save Users and Network Settings option may be grayed out and unavailable. If so, select a different volume and then return to the original volume. In such cases, you want to keep any critical data on the drive before wiping.

It refused to boot. CMD+R Does not help. What should I do?

The start of the working day did not foretell anything bad. A cup of coffee, a good mood, the Power key and the MacBook displays the following sad picture:

A restless thought immediately flashed through my head about the safety of the data, the current version of the backup copy TimeMachine(which was not at hand) and possible loss of information.

Attempt No. 1. Booting into recovery mode

Being an interested user and an avid Mac user, I immediately tried to start the MacBook in recovery mode by holding down the keys CMD+R. Instead of the usual disk utility, the system greeted me with a window with an attempt network recovery.

Having chosen my home Wi-Fi network, I began to wait for further developments. After a few minutes, OS X's recovery progress was interrupted error -4403F.

Attempts to start the process again led to exactly the same result. Rebooting the router confirmed that everything was fine with the network connection.

Trying to diagnose the Mac, fix possible hard drive errors, or simply reinstall the system was now out of the question. Section with Recovery HD, in which the tools for restoration are stored, ordered to live long.

Attempt No. 2. Resetting PRAM and NVRAM

Mac computers were created by highly qualified engineers, so the correct organization of the entire system and the presence of “hidden hardware reserves” allows you to avoid a number of interruptions in its operation. One of these reserves is memory sections PRAM And NVRAM. It stores settings data that is not reset even after the computer is disconnected from power. To revive the fallen system, a decision was made reset PRAM and NVRAM settings.

1. Turn on the Mac.
2. After the white screen appears, quickly press the key combination CMD + Option + P + R.
3. Hold until the Mac reboots again and the Mac greets the sound.

PRAM and NVRAM reset completed.

Although they say that hope dies last, it, lifeless and barely alive, continued to lurk in my mind. Resetting PRAM and NVRAM did not affect the error when booting the system. The MacBook continued to test my nerves.

Attempt No. 3. Reset SMS

Having become accustomed to storing all the necessary data “in the cloud” or on removable media, the simplest solution to global problems has always been to reinstall the system “from scratch.” This case was special. I needed data stored in memory and I needed a working Mac today.

In the Mac environment there is something called system management controller SMC. The stability of the entire system depends on the reliability of its operation. Resetting SMC settings can cure a number of problems like:

– constantly high rotation speed of the cooler even at minimal load;
– freezes while the system is leaving Sleep mode;
– errors related to the operation of additional peripherals or external monitors, as well as correcting system boot problems.

To reset the SMC, follow these steps:

Laptops with built-in batteries

1. Turn off your MacBook and plug in the power adapter.
2. Press and hold the keys at the same time Shit + Control + Option + Power and hold until the MagSafe adapter indicator changes color.
3. Release all keys and press the key again Power.

Laptops with removable batteries (older models)

1. Turn off your MacBook and unplug the power adapter.
2. Remove the battery from the laptop.
3. Hold down the key Power And hold for at least 5 seconds.
4. Release Power, insert the battery and connect the power adapter. Turn on your laptop.

Desktops (iMac, Mac mini, Mac Pro)

1. Completely disconnect the computer from the mains power.
2. Wait at least 30 seconds.
3. Connect the power and wait another 5-10 seconds and then turn on the computer.

The above actions can become really effective and the system will start. In my case, a miracle did not happen.

Attempt No. 4. Recovery using a bootable USB flash drive

An attempt to revive the system using the above actions was unsuccessful. The only option left was to reinstall OS X using a bootable USB flash drive. For this step you will need:

• another computer running the OS X operating system;
• Flash drive, at least 8 GB in size.

Preparing a flash drive

1. You will need to download the OS X Yosemite distribution from the Mac App Store.
2. To create a bootable USB flash drive, download the DiskMaker X utility (distributed for free). You will need it to deploy the distribution.
3. Format the flash drive using Disk Utility V Mac OS Extended (Journaled).

4. After the distribution has finished downloading, cancel the proposed installation and run the utility DiskMaker X.
5. Choose a system Yosemite (10.10). The utility will detect the distribution in the folder Applications. Click Use this copy(use this copy).

6. Select the drive installed in the USB port and agree to the warning about completely deleting all data present on the flash drive.

7. The process of mounting the distribution kit with OS X Yosemite to the drive will begin.

The copying process takes about 10-20 minutes and depends on the writing speed of the USB flash drive. During mounting, dialog boxes and folders may occasionally open on the screen. Do not pay attention.

Once the OS X Yosemite image has successfully deployed, remove the drive.

System installation
1. Insert the flash drive into the USB port of the “problem Mac”, press the key Power and hold down the key Alt.
2. In the list of available download sections, select OS X Base System. Please note that there is no section Recovery. .

3. The Mac will boot into recovery mode. After selecting the main system language, the installation menu will open. In the top menu you will find a standard list of utilities.

Use disk utility and first try to check the access rights to the system partition and correct any errors. If after rebooting the system still refuses to boot, you will need to separate a partition of at least 20 GB in size in order to install a new system. You will find detailed instructions on how to partition a disk.

From the same menu, you can either begin the process of installing the system on a newly created partition, or restore the system using a TimeMachine backup (see).

CAREFULLY! Be careful when choosing the installation partition. The installation must be carried out not on top of the old partition, but on a newly created one.

After the installation is complete, you will have access to all the data located on the “damaged” partition with the old version of the system.

Computer Apple is a very reliable machine, but sometimes problems with the operating system happen to it too. If something breaks and your Mac behaves very strangely - use a great Apple tool called Recovery.

An “emergency” system reinstallation is possible on Macs running version 10.7 Lion and older. While in this mode, you connect your computer to the Internet and download the full version of the operating system from there. In this case, there is no need to make an installation disk (convenient, since most Macs today are offered without an optical drive, but a bootable flash drive).

Options

OS X system utilities include more than just reinstallation Mac OS X by downloading it from the Internet. There are three more possible actions:

• Restore Mac from Backup Time Machine(if you have one).
• Disk repair Disk Utility.
• Online support via Safari.

It is recommended to first check the damaged disk using a special Apple utility (the second method listed above). If it doesn’t help, proceed to recovery - either through or through reinstallation. In this article we will look at the option of downloading from a copy of OS X from the Internet and then reinstalling the system.

How to enter Recovery mode

1. Make sure that your Mac can connect to the Internet via wireless connection WiFi. It is advisable to use a closed home network rather than an open public one.
2. Shut down (I mean turn off) your Mac. Click on the apple menu and select Switch off… If the computer does not respond (this is possible if the system is frozen), hold down the power button. After a few seconds, your Mac will turn off.
3. Wait 30 seconds (so as not to damage the computer's hard drive by quickly turning it on).
4. Turn on your Mac by pressing the power button. Important — press immediately two keys - ⌘Cmd and R! After some time, the menu described above will appear with utilities for OS X.

How to reinstall OS X via Recovery mode

Connect to a Wi-Fi network. To do this, click on the wireless network icon in the upper right corner, select the desired network and, if necessary, enter the password. Next, you can start downloading the software - the most recent version of OS X. It is worth keeping in mind that this file is quite large in size, and downloading it will take a lot of time - from several tens of minutes to several hours. Agree to install OS X and click Continue, follow the instructions that appear on your Mac screen.

Quite often, Mac users are faced with the following problem - how to return the computer to factory settings, resetting all user information, and reinstall the operating system “cleanly”. Instructions for this process are presented below.

The Mac, like most other Apple devices, is intended for personal use. This means that usually computer owners fine-tune the system for themselves and another user will not be entirely comfortable working with it. If there is a need to completely get rid of existing data and settings, then you need to follow the simple steps described below.

Clean installation of macOS: preliminary steps

IMPORTANT: Before a clean installation (reinstallation, flashing, factory reset) of a Mac, be sure to check:

• Is your Mac tied to your Apple ID and not some other one?
• Do you remember the credentials (username and password) of your Apple ID. You can check, for example, by logging in (from your computer).

The fact is that if the Find Mac function was activated on the Mac (located along the path: System Preferences → iCloud → Find Mac), then after reinstalling the system (resetting to factory settings), the system will ask you to enter the Apple ID to which the device is linked .

• How to find out (see) which iPhone, iPad, Mac are linked to Apple ID.
• How to recover (reset) a forgotten Apple ID password for iCloud, iTunes and App Store.
• What will be deleted if you sign out of iCloud on iPhone, iPad and Mac?

How to reset Macbook, iMac, Mac mini, Mac Pro to factory settings (how to reinstall macOS)

1. Make sure you have an Internet connection (for later installation of macOS), as well as an electrical connection in the case of a MacBook.

Attention! Further actions will lead to the complete deletion of ALL data on the Mac - save the necessary information on external media in advance;

2. Restart your computer (or turn it on if it was turned off) using the  menu → Reboot;

3. During the reboot process, press and hold the key combination that suits you best:

⌘Cmd + R– installing the version of macOS that was running on the computer before problems arose. Those. your Mac will install exactly the same version as before.

⌥Option (Alt) + ⌘Cmd + R– Update to the latest version of macOS that your Mac is compatible with. For example, if the Mac was running High Sierra, and the breakdown occurred after the final build of macOS Mojave was released, the system will download Mojave from the Internet and install it.

⇧Shift + ⌥Option (Alt) + ⌘Cmd + R– installation of the version of macOS that was originally installed on the computer (or the closest available version to it).

Note: macOS Sierra 10.12.4 or newer required.

4 . Then the window “ macOS Utilities"(on versions below macOS High Sierra may be called "macOS Utilities"). Here you need to select " Disk Utility" and click " Continue";

Checking and fixing boot disk errors (recommended)

1 . In Disk Utility, select your drive from the menu on the left (usually a Macintosh HD, it's at the very top).

2 . Click on First Aid.

3 . Click Launch. The application will check the boot disk for “health status”, i.e. functionality and correct existing errors. This process may take some time.

4 . Once the scan is complete, click Finish.

Erasing the boot disk

1. In the Disk Utility application, select a verified startup disk, go to the “Erase” section (at the top of the screen);

2. On the menu "Format" select APFS (for computers with macOS Sierra installed and an older version of the OS, select Mac OS Extended) and press " Erase";

3. Once the disk formatting process is complete, click " Complete" to exit Disk Utility.

Reinstalling the macOS operating system (factory reset)

Reinstall macOS using the appropriate item (screenshot below) and follow the instructions. The latest version of macOS will be downloaded from the Internet and the macOS reinstallation process will begin. During this time, the computer may restart.

Note: If you're installing from scratch, you'll have to configure your Mac and program settings all over again.

Based on materials from yablyk

Most Mac users upgrade to the next generation of operating system with a simple click of the " Update» in the Mac App Store, although a clean install of OS X is believed to be the most reliable method. In this material we will tell you how to do this.

In contact with

How to do a clean install of OS X El Capitan on a Mac by first formatting the disk?

1 . Restart your Mac and hold down the keys while turning on the computer ⌘ Cmd And R.

2 . In the loaded application, select the menu item " Disk Utility" and click the " Continue».

3 . In the left side menu, select the system drive (by default it is called " Macintosh HD") and in the main window go to the " Erase" and format it by specifying the format " Mac OS Extended (Journaled)».

Attention! All data will be deleted from the Mac.

4 . After finishing the formatting process, close " Disk Utility».

5 . Select an item Install OS X in the window " OS X Utilities", if you need to download a copy of OS X El Capitan from the Internet and click the " Continue».

6 . If you plan to use a bootable USB flash drive (by creation), then close the “ OS X Utilities».

7. In the window that appears, click Boot disk...

8 . In the window that appears, select a bootable USB flash drive with OS X El Capitan that was previously connected to your computer and click Reboot.

The computer will reboot and offer installation of the system from the USB flash drive.

It is worth noting that you can also press a button ⌥Option (Alt) on the keyboard when you turn on the computer. A list of available drives will appear from which you must select a bootable USB flash drive.