Reinstall Mac OS without losing data. Clean installation of macOS, or how to reinstall (restore factory settings) Mac
Find out how to reinstall operating system Mac to built-in or external media from the macOS Recovery partition, which makes it easier to reinstall the Mac operating system, even if you need to erase it first boot disk. All that is needed is an Internet connection. If available wireless network, you can select it from the Wi-Fi menu in the menu bar. This menu is also available in macOS Recovery Mode.
ATTENTION!
If the Find My Mac function was activated on your Mac, then after reinstallation, the system will ask you to enter the Apple ID to which the device is linked.
Run from the macOS recovery partition
To start from the macOS recovery partition, press and hold one of the following keyboard shortcuts as soon as you turn on your Mac. In general, Command + R is the recommended keyboard shortcut, especially if you've never installed macOS Sierra 10.12.4 or later.
Cmd (⌘) + R – Installs the latest version of macOS that was installed on this Mac.
cmd + Option (Alt) + R – Update to the latest version of macOS that is compatible with your Mac.
Cmd + Option (Alt) + Shift + R – Install the macOS that came with your Mac or the closest version available (available starting with version 10.12.4).
Decide whether to erase (format) the drive.
The usual reinstallation option will keep all user data in place, updating only the OS. By selecting "Disk Utility", you can completely erase boot volume. If the second system is Windows installed, the partition Boot Camp can be left unchanged.- Select Disk Utility and click Continue.
- Select your startup disk (usually the Macintosh HD, which is located at the very top left) and click on the "Erase" button at the top of the screen.
- In the window that appears, specify the name (optional) and APFS format (for computers with macOS Sierra or later installed old version OS select Mac OS Extended).
- Click « Erase » in the lower right side of the window.
Install macOS
- In the utilities window, select Reinstall macOS (Reinstall OS X).
- Click Continue and follow the on-screen instructions to select your drive and begin installation. If the installer asks you to unlock your drive, enter the password you use to sign in to your Mac. If the installer does not see the disk or reports that it is impossible to install on this computer or volume may be required clean disk >
- Wait for the installation to complete without putting your Mac to sleep or closing the lid. During installation Mac computer may restart several times and display a progress bar, and the screen may remain blank for several minutes.
If Setup Assistant appears after you restart, but you plan to sell or give away your Mac, press Command+Q to exit Setup Assistant without completing the setup process. Then click "Turn off". When the new owner starts up their Mac, they can enter their information during setup.
Most users traditionally switch to new version OS X by simply clicking the “update” button in App Store. Undoubtedly, this is the easiest method, but at the same time it is not always the most effective, since over time many Mac users notice that their system is no longer as fast as it was at the beginning of operation, and updating does not solve the problem.
Users who constantly change and reinstall software on their Mac are especially susceptible to this problem. The reason for the decrease in performance is precisely various system garbage and “residues” from remote programs which safely remain in place during the update. That is why many people prefer to install a “clean system”.
Things to remember before installing from scratch
First of all, be sure to do backup copy systems. There is a wonderful utility for this in the standard set of OS X programs. Time Machine.
Also be sure to make sure that all your contacts, calendars, mail, etc. synced with iCloud (settings>iCloud)
Clean installation of OS X El Capitan step by step
2. Reboot the Mac while holding down the key option(aka alt).
3. Choose as bootable media flash drive.
4. After the Mac boots Recovery from the USB flash drive, visually it will happen like this:
open Disk Utility and format it HDD Mac.
5. To do this, select the section hard drive in the left panel, then in the top panel click erase(do not change the format and name) then click again erase(at the bottom).
6. After formatting is complete, close Disk Utility and select reinstall OS X.
7. In the next window, select only the formatted hard drive and after completing the installation process you will receive a crystal clear OS X El Capitan.
By the way, you can reinstall the system from scratch without bothering with a flash drive. True, you need to have Capitan installed on your Mac before, also from scratch, otherwise the version of the system that came “in the box” will be installed.
So, if such a need arises, then restart your Mac while holding cmd+R, open Disk Utility and format the hard drive as shown above. Then you also choose Reinstall OS X and wait for the installation to complete.
MAC OS, like Windows, sometimes requires reinstallation. This may be due to slow work your MAC device or in connection with its sale (I don't think you'll be happy with the sale of a MAC with your personal information). Or vice versa, buying with hands MACBOOK(PRO, AIR) or iMAC with a bunch of strange files or not necessary 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.
So, before you start, you need to transfer all necessary information to external media, since after reinstalling MAC OS it will be practically 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;
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 left top corner and select "About this MAC". The window that opens will contain information about installed version MAC OS.
If you are using a version older than 10.7, you need to update it.
You should load "OS X Utilities", if this does not happen, repeat the procedure by rebooting and pressing the "COMMAND" + "R" key combinations.
Select Disk Utility.
IMPORTANT!!! The following steps will delete all data on your drive, so you need to be sure that necessary files no on 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.
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.
In the next information window, click “Continue”.
The next step is to read the license agreement and accept it.
Then select the installation drive. In this case, the choice is obvious. Click the "Install" button.
After this, the MAC OS download process will begin.
After this, the MAC will automatically reboot and start MAC installation OS
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.
You can connect to Wi-Fi networks(You can skip this step if you wish).
If you want to restore data you previously made using Time Machine or Windows computer select the appropriate item, 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 next step is to sign in with your Apple ID. IN in this example I will not do it.
Then read the license agreement and accept it.
After this, provide your credentials (username and password) and click “Continue.”
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.
In my opinion, installing MAC OS is incredibly simplified, you don’t even need disks with the operating system - pressing a few keys + an hour of time and you have a “clean” MAC OS.
Fair, not overpriced and not underestimated. There should be prices on the Service website. Necessarily! without asterisks, clear and detailed, where technically possible - as accurate and concise as possible.
If spare parts are available, up to 85% of complex repairs can be completed in 1-2 days. Modular repairs require much less time. The website shows the approximate duration of any repair.
Warranty and responsibility
A guarantee must be given for any repairs. Everything is described on the website and in the documents. The guarantee is self-confidence and respect for you. A 3-6 month warranty is good and sufficient. It is needed to check quality and hidden defects that cannot be detected immediately. You see honest and realistic terms (not 3 years), you can be sure that they will help you.
Half the battle is Apple repair- this is the quality and reliability of spare parts, so a good service works with suppliers directly, there are always several reliable channels and your own warehouse with proven spare parts for current models, so that you do not have to waste extra time.
Free diagnostics
This is very important and has already become a rule of good manners for service center. Diagnostics is the most difficult and important part of the repair, but you don't have to pay a penny for it, even if you don't repair the device based on its results.
Service repairs and delivery
Good service We value your time, which is why we offer free shipping. And for the same reason, repairs are carried out only in the workshop of a service center: they can be done correctly and according to technology only in a prepared place.
Convenient schedule
If the Service works for you, and not for itself, then it is always open! absolutely. The schedule should be convenient to fit in before and after work. Good service works on weekends and holidays. We are waiting for you and working on your devices every day: 9:00 - 21:00
The reputation of professionals consists of several points
Company age and experience
Reliable and experienced service has been known for a long time.
If a company has been on the market for many years and has managed to establish itself as an expert, people turn to it, write about it, and recommend it. We know what we are talking about, since 98% of incoming devices in the service center are restored.
Other service centers trust us and refer complex cases to us.
How many masters in areas
If there are always several engineers waiting for you for each type of equipment, you can be sure:
1. there will be no queue (or it will be minimal) - your device will be taken care of right away.
2. you give to Macbook repair an expert in the field of Mac repairs. He knows all the secrets of these devices
Technical literacy
If you ask a question, a specialist should answer it as accurately as possible.
So that you can imagine what exactly you need.
They will try to solve the problem. In most cases, from the description you can understand what happened and how to fix the problem.
Most Mac users have made the transition to the new macOS Sierra operating system without any problems, but there are some who have encountered problems. If your computer starts to run slower or has problems with software, it makes sense to reinstall the OS. This article will discuss the method reinstalling macOS Sierra, which does not involve completely formatting the Mac and deleting user data. That is, this is not a “clean” installation of the system, in which all data is deleted.
Even though this is simply a reinstallation of macOS Sierra and won't affect anything else, theoretically there could be problems along the way. Therefore, we highly recommend that you back up your Mac.
How to reinstall macOS Sierra
Step 1: First of all, back up your data on your computer.
Step 2: Restart your Mac, press and hold COMMAND + R at the same time right after you hear the boot sound. This will put the computer into recovery mode.
Step 3: In the macOS Utilities window, select Reinstall macOS.
Step 4: Click Continue and follow the onscreen instructions.
Step 5: In the drive selection window, select your hard drive on which macOS will be installed and click “Install.”
Once the macOS Sierra reinstallation process starts, the screen will turn black and a white Apple logo will appear with a progress bar and the amount of time remaining until completion.
When finished, macOS Sierra will automatically launch normally. Yours Account, data, applications and settings will remain in place. The reinstallation involves re-indexing the files on the drive, which may impact performance, but when completed, your Mac will function as before.
Some users have noted that reinstalling macOS Sierra helped solve many problems that arose after the update. Therefore, it is absolutely not necessary to resort to extreme measures and perform a “clean” installation.
