How to reinstall OS on McBook. Reinstalling Mac OS on MacBook Pro. How to reinstall Mac OS from the installation flash drive. What if I lose important data in the process? Attention! All data will be removed from Mac

To reinstall MacOS, no autonomous media is required. Apple officially recommends users to use network installation Systems. You can run it from a special partition for restoring hard disk or taking advantage of internet function Recovery. In this material we will tell how to reinstall MacOS using both ways.

Any Apple's computer comes with preset OS. No matter, you buy the IMAC or MacBook monoblock in any modification: Pro, AIR or 12-inch Retina. Version operating systemwhich was on it when buying, not every user will remember. Regular free updates MacOS is eliminated from the need to score the head with this information. It will be needed when you decide to reinstall the system.

  1. Click in the upper left corner of the menu string on the logo with an image of an apple. In the list that opens, select the topmost point marked in the screenshot.
  1. On the main tab we can find out the installed version MacOS. A little below provides information about the model and time of the laptop.

If you are not a clear opponent of updates, then you must have the latest available two of your hardware configuration OS version. Otherwise, knowledge of the model and year of release will allow it to determine.

Available options

Now that we know the necessary information about our Mac, consider available opportunities. There are only three options that are selected by various key combinations, pressed when the computer is started:

  • reinstalling the current version of the operating system using the recovery partition on the hard disk or SSD - (Command ⌘ + R);
  • recovery to the old OS installed at the time of purchase. Depending on the year of release, this may be Mountain Lion, Yosemite or El Capitan - (Command ⌘ + Option ⌥ + R);
  • loading and installation latest version MacOS supported by your Mac - (SHIFT + COMMAND ⌘ + Option ⌥ + R).

An indispensable condition for successfully executing all the actions described hereinafter is to connect a computer to the Internet. It will be required instead installation mediaTo download the desired distribution.

  1. Call the system menu and reboot.
  1. Depending on the selected reinstall option, clamp the desired keyboard combination. With the participation of the Option key, Internet Recovery starts. You can release the buttons when a rotating globe appears on the monitor. The indicator below shows the time before starting the disk utility, which will depend on the connection speed. The download source is determined automatically, while to search for the initial version of the OS will be used serial number Mac computer.
  1. By selecting a reinstall from the recovery section on SSD, wait for the logo on the logo screen to appear. After that, the keys can be released. Any of the options used will lead us to the window appear with MacOS utilities. Next steps depend on whether you want to save previously created system settings Or prefer a clean installation.

The usual reinstallation option will save all user data on the spot, updating only the OS. Selecting Disk Utility, you can completely erase the loading volume. If the second system is installed Windows, section Boot Camp. You can leave unchanged.

Installing Macos.

The use of the disk utility is recommended when it is impossible to perform the usual one. Thus, the installer diagnoses the problems in which the completion of the operation without formatting the volume may fail. When reinstalling with return to old version OS, erasing system Disc - Mandatory procedure. Otherwise, the MacOS installer will report that he discovered a more recent version and refuses to continue.

  1. Opening Disk utility In the left part of the window, choose "Macintosh HD". By default, the OS always uses this name for system volume. In the top menu, the item "Erase" will be active. In the drop-down window, select the type of FS specified in the screenshot. In some cases, at this stage, the third line is invited to select sections hard disk. For all MacOS versions, install GUID.
  1. High Sierra supports new file System APFS adapted to work with solid-state drives. The installation program will automatically select it when reinstalling on the last topical version of the OS. Disk encryption at this stage can not be connected. If necessary, make it possible in already installed systemBy activating the FileVault function. By formatting, close the disk utility and start the installation.
  1. Accept license agreementBy clicking the marked button in the drop-down menu.
  1. The following few steps will allow primary settings by specifying the preferred keyboard layout and the residence region. At the final stage, the previously saved Safari bookmarks and music in iTunes appear in the clean OS, select the entry from Apple ID.

During the installation process, the computer will independently reboot several times. The execution stroke is shown by the filling band of the indicator and the reverse counter of the time.

Finally

As you might make sure, when connecting to the Internet, the MacOS reinstall is not a challenge. Creating in this case is an excessive spending time and it may be necessary only if you want to use the OS version, intermediate between the pre-installed and relevant.

Video instruction

The video below shows all the stages described in detail. After reviewing it, you can confidently act during self-reinstalling MacOS.

Reinstalling MacOS (OS X) can be performed by completely different reasons (the sale of a computer, solution of program problems or such with iron). In any case, it is quite simple (especially about computers on windows database) The process does not require the creation of the loading flash drive.

There are three main types of reinstalling MacOS - with full data cleaning (if you, for example, will sell Mac), without deleting personal data and restore from a backup.

Attention!

  1. Both types of installation require an active Internet connection (the operating system is directly downloaded from Apple servers). If there is no such, it will require the creation of a boot flash drive on a Mac or PC.
  2. If you are important to the safety of the data do not forget to do backup (If there is a second disk on a Mac or an external hard disk Use the utility Time Machine).
    3.

Reinstall MACOS (OS X) with full data formatting

Step 1 Run MacOS in the recovery mode, for which when you turn on or when you restart the computer, hold the COMMAND (⌘) + R or OPTION keys (⎇) + Command (⌘) + R (if you run the download from the MacOS recovery section, then Thanks to this shortcut, you run the MacOS restore via the Internet) until the Apple logo appears on the display

Step 2 After the download is complete, the Utility window will appear (service macos programs / OS X streets). Open the "disk utility" and format the system hard disk


For this:

  • select timing or disc in the left side menu and click on the erase button
  • as a format, select "Mac OS Extended (Journal)"
  • enter a new volume name or disk
  • if you want to fully protect yourself and eliminate the further recovery of the vigorous data by third parties, click "Security Settings", with the help of a slider. Specify the number of cycles of overwriting over old data and click OK. Rewaging function is not available for SSD drives
  • click erase and ready

Step 3 From the Utilities window, select Reinstall Macos. or Reinstall OS X.


Step 4 After downloading and installing MacOS, the computer will restart and the setup assist will start. If the computer goes on sale, then press the Command key combination (⌘) + Q and select Disable to new user configured Mac according to your requirements

Reinstalling MACOS (OS X) with preservation of personal data

Mac is possible to reinstall MacOS to the current or older version of the operating system without deleting personal data. The whole process is almost identical to the previous chapter except that it is not required to perform step 2 (refuse the "disk utility" service and do not format a hard disk). After selecting item Reinstall Macos. or Reinstall OS X. In the "disk utility" will reinstall MacOS to the version that was installed on Mac last.

MacOS recovery (OS X) through Time Machine

If you have a backup copy of MacOS created using the Time Machine utility, you can recover the system. During such a recovery hDD Clears and all its contents is replaced with fresh MacOS data and information from the Time Machine backup.

To restore MacOS via Time Machine, follow these steps:

Step 1 Get the MacOS launch in the recovery mode, for which when you turn on or when you restart your computer, hold the COMMAND (⌘) + R or OPTION keys (⎇) + Command (⌘) + R (if you run the download from the MacOS recovery section, then Thanks to this shortcut, you run the MacOS restore via the Internet) until the Apple logo appears on the display

Step 2 After the download is complete, the Utility window will appear ( Service Programs MacOS / OS X streets). From the Utilities window, select Restore from backup Time Machine And click Continue. Next Follow the instructions utilities


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The Mac OS X operating system is considered one of the most reliable and stable, but unfortunately, it is completely insured completely from trouble. That is why the MAC user needs to know how to reinstall Mac OS X via Recovery alone. Such a reinstall is possible in all OS for computers applestarting with Mac OS X 10.7 Lion. Recovery mode allows you to connect to the Internet to download the actual version of the operating system and install it without resorting to record files to media. Reinstalling Mac OS X via Recovery is very convenient for MacBook owners, as most new laptops are produced without optical drive, And the creation of the loading flash drive can be sufficiently troublesome business, especially for the beginner.

Apple developers have provided the ability to not only download the operating system from the network, but also restore from a backup using Time Machine, as well as to correct files using a special "disk utility". If you notice that your Mac operating system does not work as before, it is necessary to start troubleshooting the problem from checking the disk "disk utility". If the elimination of errors did not help, then it is worth thinking about restoring Mac OS X through Time Machine or downloading the operating system files from the network. We will look at how to reinstall Mac OS X from the Internet.

How to enter B. recovery mode
  • First, make sure your Mac is connected to the Internet
  • In conventional method Turn off your computer. Sometimes, with the "hang", it is impossible to do with the menu - in this case the device turns off using the POWER button
  • Wait 30-40 seconds (this is done in order not to damage the hard drive of the device) and turn on the MAC power button. Immediately after turning on, hush ⌘cmd and r on the keyboard.
  • After executing the actions described above, the Mac OS X utility selection will appear on the computer screen.

  • Connect to the Internet via Wi-Fi
  • Select from the "Reinstall Mac OS X" list
  • Best patience, since the volume of the OS files is sufficiently impressive and much depends on the speed of the connection to the network

Most users traditionally go to new version OS X By the elementary pressing the "Update" button in App Store.. Undoubtedly it is easy wayBut at the same time is not always the most efficient, since over time, many makovodas notice that their system is no longer so smart as it was at the beginning of operation, but the update does not solve the problem.

Especially such troubles are subject to users who constantly change and reinstall software on their Mac. Wine reduction of speed is precisely different system trash and "residues" from remote program Which safely remain in place when updating. That is why many prefer to set the "clean system".

What you can not forget before installing "from scratch"

First of all, be sure to back up the system. To do this, the standard set of OS X programs has a wonderful Time Machine utility.

Also be sure to make sure all your contacts, calendars, mail, etc. Synchronized with ICloud (Settings\u003e ICloud)

Net Installation OS X El Capitan Step

2. Reboot Mac holding key option (She is alt.).

3. Choose as boot media USB flash drive.

4. After the MAC is loaded from the Recovery flash drive, it will be visually to happen like this

open Disk utility and format the Mac hard drive.

5. To do this, select the hard disk section in the left pane, then press the top panel. erase (do not change the format and name) then click again erase (down below).

6. After the format is finished, close Disk utility and select reinstall OS X..

7. In the next window, select only that formatted hard disk and after the installation process is completed, you get the crystal clear OS X El Capitan.

By the way, reinstall the system from scratch and not bothering with a flash drive. True, it is necessary that before that Mac already stood Capitan installed also from scratch, otherwise the version of the system that went "in the box" was established.

So, if such a need arises, then restart Mac while holding cmd + R.Open Disk utility And format the hard disk as shown above. After also choose Reinstall OS X. And wait for the end of the installation.

In some situations, MacK users may need to reinstall the system. Today we want to introduce you to the methods of making this procedure.

Technically, there are two options for the new installation of the system - via the Internet and by means of a boot drive. Methods are distinguished available options Systems and convenience for the end user.

Method 1: Reinstalling via the Internet

One of the features of MacOS is the ability to install the system by connecting to the Internet. The comprehensive requirement is the presence of a stable connection to the worldwide network. Reinstalling in this case starts when the computer is loaded and requires a specific key combination, we will talk about.

  1. Open the Apple menu and select Option "Reload".

  2. During computer boot, press and hold the following keyboard shortcuts:
  3. Release the keys when the rotating globe icon appears on the screen with text. "Starting Internet Recovery. This May Take a While.

  4. The text after a few seconds will change the loading band - wait until the selected version of MacOS is loaded and installed.

    Attention! Do not disconnect the device from electrical networkAnd do not close the MacBook cover!

  5. Window appears "Utilities"select it in it "Reinstall MacOS".

  6. The installation procedure will start, after which the system of the wizard of the first system setup appears.

This method will not work in the case of some types of connection to the Internet (mainly VPN connection) or if there is a strict NAT on the side of the provider. If your Internet connection is not suitable, you can use the Next method.

Method 2: Reinstall from the bootable media

More time-consuming, however, the more reliable method of re-installation MacOS is to use the boot drive, mainly flash drives. Previously need to download to your Mac installation image from the AppStore and then write it onto the media by introducing certain commands to "Terminal".

The disadvantage of this method is obvious - the boot drive will not be able to create if the computer does not load the system. In this case, it is worth trying to restore the system from the Time Machine backup or reset it to the factory settings.

Solutions possible problems

The process of reinstallation of the operating system does not always go smoothly, so consider the most frequent problems.

The computer does not respond to key combinations
If the device does not respond to the shortcuts of the keys from the method 1, most likely, you have pressed too late the buttons or they released them early. Please note that depending on the model, the combination must be kept up to 15 seconds. It is also impossible to exclude the failure of the keyboard, especially if a wireless version is used. In this case, it is better to connect a wired device into one of the free ports.

The boot process hung
If it seems to you that the download process when reinstalling over the Internet hung, just wait - even the system itself warns that the operation may take a long time, especially if bandwidth Communication channel with a worldwide network is less than 4 Mbps.

Conclusion

Reinstalling MacOS is a fairly simple task - to solve it, it is enough to have an internet connection or blood flash drive With the MacOS recorded on it.