reinstall ios macbook. How to reinstall mac os on macbook. Installing Mac OS X Yosemite from Scratch

Any operating system sooner or later needs a complete reinstallation. The reasons for this may be different: infection with virus programs, bugs, and so on. As a result of pollution junk files, processes the device starts to work much more slowly. In some cases, it is easier to reinstall the system than to look for the cause of the problem and fix it. Let's figure out how to reinstall Mac OS and what it takes.

What do you need to reinstall?

Those users who are familiar only with computers on the operating Windows system, will not be able to reinstall the OS on a Mac without additional help. To reinstall Mac OS on a MacBook, you must prepare the following:

Macbook () that is connected to the network;
our step-by-step instruction.

Now let's go directly to the clean installation process Mac versions OS. This instruction suitable for those who has the version installed operating system 10.7 or later. If you have an older version, then it should be updated using standard OS tools. You can check the software version using the following steps:

How to reinstall Mac OS Sierra from scratch?

To begin with, it is worth noting that reinstalling a Mac involves completely deleting data from hard drive computer. Therefore, first copy all important information to third-party media.

This can be done using the program for Reserve copy time machine. Following the instructions of the copy wizard, you can easily create a backup copy on external media. Time Machine can also create backups in automatic mode. Old copies will be deleted, and new ones will be saved to disk. So you will not worry about the relevance of the data.

Now you know how to reinstall mac os x on macbook pro or air, as well as iMac. Next, you need to configure the system and complete the installation process.

Final setup before use

After the installation is completed, the program will prompt you to carry out basic settings:

on the first screen, select your Mac OS language. In the future, it can be changed inside the software settings;
on the second screen, you will be prompted to connect to Wi-Fi (optional). This step can be skipped;
The next step is information transfer. Before you reinstall your Macbook Pro, Air or iMac you can back up all your data;
authorization via Apple ID (optional);
Adoption license agreement;
creation account Mac OS for computer.

Ready! Now you can independently install Mac OS on a MacBook of any version or an iMac monoblock. The whole process is as simple as possible: the user only needs a few keystrokes.

Quite often, Mac users are faced with the following problem - how to return the computer to factory settings, reset all user information, and reinstall the operating system "clean". Instructions for this process are provided below.

Mac, like most other devices from Apple, is designed for personal use. And 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 the existing data and settings, then you need to follow the simple steps described below.

Clean Install macOS: Prerequisites

IMPORTANT: Before a clean install (reinstall, flash, factory reset) of a Mac, be sure to check:

Is the Mac tied to your Apple ID, and not to any other
Do you remember the credentials (login and password) of your Apple ID. You can check, for example, by logging in (from a computer).

The fact is that if the Find Mac function was activated on the Mac (located along the path: System settings→ iCloud → Find Mac), then after reinstalling the system (factory reset), 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 restore (reset) forgotten password to an Apple ID for iCloud, iTunes and App Store.
What gets deleted when you sign out of iCloud on iPhone, iPad, and Mac?

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

1. Make sure you have an internet connection (for later installation of macOS) and an electrical connection for a MacBook.

Attention! Next steps lead to complete removal ALL data on Mac - save the necessary information in advance on external media;

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

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

⌘Cmd+R- install the version of macOS that was running on the computer before the problems occurred. 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" worked on High Sierra, and the breakdown occurred after the release of the final build of macOS Mojave, the system will download from the Web and install Mojave.

⇧Shift + ⌥Option (Alt) + ⌘Cmd + R– installing 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 later required a new version OS.

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

Check and fix boot disk errors (recommended)

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

2 . Click on First Aid.

3 . Click Launch. The app will check boot disk on the "state of health", i.e. performance and fix any bugs. This process may take some time.

4 . Once the verification is complete, click Done.

Erase boot drive

1. In the Disk Utility application, select a verified boot 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 above) old version OS select Mac OS Extended) and press " Erase";

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

Operating room reinstallation macOS systems(factory reset)

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

Note: when you install from scratch, you will have to configure your Mac and programs settings again.

According to yablyk

It refused to boot. cmd+r Does not help. How to be?

The beginning of the working day did not bode well. A cup of coffee, a good mood, the Power key and the MacBook displays the following dull picture:

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

Attempt #1. Boot in recovery mode

Being an inquisitive user and an avid "Makovod", 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 met me with a window with an attempt network recovery.

By choosing home wifi network I began to wait further development events. A few minutes later, OS X recovery progress was interrupted error -4403F.

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

About trying to hold Mac diagnostics, fix possible mistakes hard drive or corny reinstall the system was now out of the question. Section with Recovery HD, which stores the tools for recovery, ordered to live a long time.

Attempt #2. Reset PRAM and NVRAM

Mac computers were built by highly skilled engineers, so proper organization the entire system and the presence of "hidden hardware reserves" avoids a number of interruptions in its operation. One of these reserves are sections of memory PRAM and NVRAM. It stores settings data that is not reset even when the computer is turned off from the 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 hold down the key combination CMD+Option+P+R.
3. Hold until the next reboot and the Mac welcome sound.

PRAM and NVRAM reset is complete.

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

Attempt #3. Reset SMS

Accustomed to storing all the necessary data “in the cloud” or on removable media, most simple solution global problems have always remained reinstalling the system from scratch. This case was special. I needed in-memory data, and I needed a working Mac today.

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

sleep mode

external monitors

To reset the SMC, follow these steps:

Laptops with built-in batteries

1. Turn off your MacBook and plug in the power adapter.
2. Simultaneously hold down the keys Shit + Control + Option + Power and hold until the MagSafe adapter light color changes.
3. Release all keys and press the key again power.

Notebooks 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 unplug your computer from AC 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, the miracle did not happen.

Attempt #4. Recovery using a bootable flash drive

An attempt to revive the system using the above steps was unsuccessful. stayed the only option- reinstalling OS X with bootable flash drive. This step will require:

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

Preparing a flash drive

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

4. After the distribution is downloaded, cancel the proposed installation and run the utility Disk Maker X.
5. Choose a system Yosemite (10.10). The utility will detect the distribution kit in the folder Applications. Click Use this copy(use this copy).

6. Select the drive installed in the USB port and agree with the warning about the complete deletion of all data present on the USB flash drive.

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

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

After successfully deploying the OS X Yosemite image, remove the drive.

System installation
1. Insert a 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 partitions for download, select OS X Base System. Note the absence of a section Recovery. .

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

Take advantage disk utility and try first to check the access rights to the system partition and correct possible errors. If after rebooting the system still refuses to boot, you will need to separate a partition that will be at least 20 GB in size in order to install new system. Detailed instructions by partitioning the disk you will find .

From the same menu, it is possible to either start 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. Installation is required to be carried out not over the old partition, but on the newly created one.

After the installation is completed, you will have access to all data located on the "corrupted" partition with the old version of the system.

If the creation of an additional disk partition failed

If for some reason you were unable to create an additional disk partition to install a new version of OS X, and saving the data remaining on the broken partition is still a priority, there is an option to install OS X using a previously created bootable USB flash drive on external drive.

2. After making sure that everything you need has already been transferred to an external drive, go to the App Store and download OS X Yosemite image.

This step must be completed in without fail because for a clean install, your account must first upgrade to OS X Yosemite. Only in this case, the Mac will offer to reinstall OS X Yosemite (and not OS X Mavericks if you skip the update from the App Store).

without updating through the App Store, you will be offered OS X Mavericks as a "clean system".

Thus, you first update the existing OS X Mavericks to OS X Yosemite through the App Store, and then perform a clean installation of the system.

After updating to OS X Yosemite through the App Store and successfully logging in, we reboot.

3. As soon as it appears before your eyes White screen and the Mac makes a characteristic boot start sound - hold down the key combination Command+R. Patiently waiting for the passage of the loading lane.

4. We are met by a window OS X Utilities. Choose disk utility and press Continue.

5. Choose Main drive on which the system was installed, give it a name and select Erase. After a few seconds, you will see a completely blank disk.

6. Close disk utility and go to step Reinstall OS X(in the OS X Utilities menu). As the target disk for installation, select the newly formatted one. The installation will start immediately.

When reinstalling a system from scratch, consider what you must know the account password used in Mac App Store. Otherwise, installation will not be possible.

7. Pay attention to the status WiFi connections (upper right corner) - the presence of the Internet is required, since the system will be loaded from Apple servers. Otherwise, you risk getting an error.

Depending on the workload of the servers at a particular point in time, the installation may take from 20-30 minutes before several hours. If you are able to connect using power cord "twisted pair"- this can significantly speed up the download.

After rebooting, you will be greeted by the start screen of the new OS X Yosemite and will be prompted to go through the usual “first login” steps.

Happy installing and testing the new OS X Yosemite.

Clean Install macOS: Prerequisites

IMPORTANT: Before a clean install (reinstall, flash, factory reset) of a Mac, be sure to check:

Is the Mac tied to yours, and not to any other
Do you remember the credentials (login and password) of your Apple ID. You can check, for example, by logging in on this page (from a computer).

The fact is that if the function was activated on the Mac (located along the path: System settings → iCloud → ), 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.

ON THIS TOPIC:

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

Boot Mac in Recovery Mode

1. Make sure you have an internet connection (for later installation of macOS) and an electrical connection for a MacBook.

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

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

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

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

⇧Shift + ⌥Option (Alt) + ⌘Cmd + R– installing 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»(may be called "macOS Utilities" on versions below macOS High Sierra). Here you need to select " Disk Utility" and click " Continue";

1 . Select in Disk Utility your drive in the menu on the left (usually Macintosh HD, it is at the very top).

2 . Click on the caption First aid.

3 . Click Run. The application will check the boot disk for a "health condition" i.e. performance and fix any bugs. This process may take some time.

4 . Once the verification is complete, click Ready.

Erase boot drive

1. In the application disk utility, select a verified boot disk, go to the section "Erase"(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. When 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: when you install from scratch, you will have to configure your Mac and programs settings again.