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Reinstall and update Mac OS

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Advanced computer users, like security experts, recommend using the latest software versions, including operating systems. Next, we want to talk about the procedure for updating iMac or MacBook to the latest version of macOS.

Features and requirements of the new version

The latest at the time of writing of this article is macOS Mojave 10.14.3, released in October 2018. Of the notable innovations, this release brought a long-awaited dark theme, deeper integration of Siri assistant, a systematization tool for “Stacks” files, as well as improved removal tools screenshots. The general system requirements for installing this update are as follows:

  • OS X 10.8 or later
  • 2 GB RAM
  • 12.5 GB of free disk space,

Please note that Mojave will not be able to install on all Apple devices - make sure yours matches the list below.

  • Macbook 2015 or later
  • Macbook air 2012 or later
  • Macbook pro 2012 or later
  • Mac mini 2012 or later
  • iMac 2012 or later
  • iMac Pro,
  • Mac pro release 2013, 2010 and 2012 with a graphics card that supports Metal technology.

Upgrade procedure to macOS Mojave

Before proceeding with the update, we recommend that you make a backup using Time Machine: firstly, it will help restore functionality to the computer in case of problems with the update, secondly, it will protect important data, thirdly, it will allow you to roll back if the update does not suit you .

  1. Open the Apple menu and select "System Settings".

Find item "Time Machine" and use it.

Click on item "Select a backup drive". Use one of the internal drives or connect an external one, as Apple recommends.

  • Wait until the backup is created.
  • Now you can proceed with the update.

      Open the Mac AppStore from the Dock.

    Select a result from the category Utilities.

    Press the button "Download"to start downloading the installation file.

    Note! The installer is about 6 GB in size, so the download process can take a long time!

    A new item should appear in them called "Install macOS Mojave". Launch this app.

    Select item "Continue".

    You will also need to accept a license agreement.

    Next, the installer will prompt you to select a drive to install the new version of macOS. Most often, the main drive will be available, "Macintosh HD", choose it.

  • The installation procedure for the latest version will begin. It may take some time, up to 30 minutes. In the process, the computer will restart several times - do not pay attention, this is normal, you just need to wait.
  • As a rule, the update picks up all user settings, so after installation you only need to enter the administrator password and choose a light or dark design for the system.
  • Done - Your Apple device has been updated to the latest version of the operating system.

    Possible problems and solutions

    Some users may have difficulty downloading or installing updates. Below we describe the most common problems and methods for resolving them.

    Mojave installer takes too long to load
    First of all, the problem lies in the insufficiently fast Internet connection. Also, the download may freeze when a connection is lost or problems with Apple servers. The latter can be checked at the following link.

    There is also a reason to use a wired connection rather than Wi-Fi - just connect your computer to the router or insert the Internet cable into the appropriate connector.

    The installer gives the error "macOS could not be installed on your computer"
    If the installer of the latest macOS reports that it cannot install the update, do the following:

    1. Close the installer with a shortcut Command + Q.
    2. Check if there is enough free space on your hard drive / SSD: recall that macOS Mojave needs at least 12.5 GB of space. It also does not hurt to check the status of the drive through Disk Utility.

  • Ensure that the characteristics of the target computer meet the system requirements of the update to be installed.
  • Restart your computer (Apple menu - "Reload ...") and try starting the installation again.

    If you get an error again, close the installer and turn off the computer. Then turn it on again, but this time with the key held down Shift: this initiates a system boot in Safe Modewhere only important system components work. After the device is fully turned on, try the installation procedure for the update. If a "Safe mode" didn’t help, try installing the Combo version of the update - you can download it from the official Apple website using the link below.

    The fact is that the update from the AppStore is incomplete - it lacks some system files. This data may be corrupted on the final system, which will require replacement. This will help the Combo version of the installer. Installing this option is no different from the usual, but takes a little longer.

    Installation failed, the computer does not boot the system
    If something went wrong at the last stage of the installation, and the computer cannot boot into the system, go into recovery mode and recover from the backup or reinstall the OS.

    Preparing for reinstallation

    Friends, today we will learn how to reinstall Mac OS and update it. Before you begin, it’s important to decide what exactly you need to do. That is, it will be necessary to understand whether a complete reinstallation of the operating system or a simple update is required. You will also need to prepare the device for reinstallation (for example, if you are going to sell your device).

    In addition, you can restore from a TimeMachine backup if you configured it. So, first things first:

    1. If you want to update your Mac OS, you can back up it just in case, so that in case of unforeseen circumstances, you can restore the system.
    2. If you are going to restore the OS, then no action is required. However, you can check for backups if you want to install one of them.
    3. With a full reinstall, you will also need, as in the first paragraph, create a copy. Then be sure to deauthorize your computer or laptop in iTunes. To do this, run the program, open the "Account" tab, select the authorization item, and then open the deauthorization item. Please note that your Apple password may be required> Reinstall

    • First of all, note that the following instructions provide for reinstalling Mac OS with the installation of the version of the operating system that was installed when you purchased the device. That is, if you purchased a Macbook with OSX Mavericks, and you later upgraded it to ElCaptain, then after reinstalling the laptop will again Mavericks. It is also worth remembering that all your data will be deleted from the computer. This method is suitable for those who want to sell their device, give it to someone or just get the device “like out of the box”. If this method does not suit you, then go to the “Recovery” paragraph.
    • So, let's get started: immediately after turning on the computer, hold down the keyboard shortcut Option + Command + R.

    • Once you see the Apple logo, you can release the buttons.
    • If you did everything correctly, then the "Disk Utility" will start, with which you will need to perform the cleaning of the built-in hard disk. Note that the journal format Extended should be used. After that you can close the window.
    • Now click on “Reinstall mac OS”. Following the prompts on the screen of your computer or laptop, follow these steps.
    • When your device reboots, you will see a configuration assistant in front of you that opens when you turn on macOS for the first time. If you do not want to configure (for example, as mentioned above, when selling the device), then use the combination Command + Q to turn off the Mac. Thus, you will provide the opportunity to configure another user, your future buyer. Done! This reinstallation ends.

    Recovery

    Recovery with Time Machine

    If you have a backup of Time Machine, you will need to boot the device from the recovery partition using the Command + R combination when you turn on the computer. In the mac OS utility window, select the item of the same name. Please note that all data from the disk will be cleared and replaced with information and files from your backup. The recovery itself is easily carried out using the instructions on the computer screen.

    If you want to reinstall the Mac device without erasing your data (that is, restore), repeat the steps in the previous paragraph to launch the utility program window. If necessary, clean the disk using the utility you already know. If you do not know it, then return to the third paragraph of the reinstallation paragraph. After closing the program window, click on "Reinstall mac OS" and follow the steps that the assistant dictates to you.

    Conclusion

    Dear friends, today we have completely sorted out all the questions on working with macOS:

    1. Reinstallation with cleaning and deleting all data for further sale of the device or transfer to another user.
    2. Updating the operating system through the Mac App Store.
    3. System Restore from Time Machine Backup.
    4. Reinstallation with personal data.

    We hope that everything worked out for you and there are no any misunderstandings or questions. Tell us in the comments how your reinstallation or recovery of macOS went. Enjoy your use, dear readers!

    Reinstall

    • First of all, note that the following instructions provide for reinstalling with the installation of the version of the operating system that was when you purchased the device. That is, if you purchased a Macbook with OSX Mavericks, and you later upgraded it to ElCaptain, then after reinstalling the laptop will again Mavericks. It is also worth remembering that all your data will be deleted from the computer. This method is suitable for those who want to sell their device, give it to someone or just get the device “like out of the box”. If this method does not suit you, then go to the “Recovery” paragraph.
    • So, let's get started: immediately after turning on the computer, hold down the keyboard shortcut Option + Command + R.

    • Once you see the Apple logo, you can release the buttons.
    • If you did everything correctly, then the "Disk Utility" will start, with which you will need to perform the cleaning of the built-in hard disk. Note that the journal format Extended should be used. After that you can close the window.
    • Now click on “Reinstall mac OS”. Following the prompts on the screen of your computer or laptop, follow these steps.
    • When your device reboots, you will see a configuration assistant in front of you that opens when you turn on macOS for the first time. If you do not want to configure (for example, as mentioned above, when selling the device), then use the combination Command + Q to turn off the Mac. Thus, you will provide the opportunity to configure another user, your future buyer. Done! This reinstallation ends.

    What do you need

    So, for starters, let's decide which Mac models support the new OS X. Apple has not officially announced the system requirements for its new OS, but judging by the fact that it works on any Mac that supports OS X 10.6.8 and later OS X, the list of supported models includes:

    • iMac (mid 2007 and newer),
    • MacBook (aluminum model - end of 2008 and later, new model - beginning of 2009 and later),
    • MacBook Air (late 2008 or newer),
    • 13-inch MacBook Pro (mid-2009 or newer):
    • 15-inch MacBook Pro (mid-end 2007 or newer),
    • 17-inch MacBook Pro (late 2007 or newer),
    • Mac mini (early 2009 and newer),
    • Mac Pro (early 2008 and newer),
    • Xserve (early 2009).

    Important Note: Keep in mind that the ability to install OS X Mavericks on these Mac models does not guarantee features such as Power Nap, AirPlay-mirroring, and AirDrop, which have more stringent system requirements.

    Apple also did not say how much RAM should be installed on your Mac so that it “pulled” Mavericks, but experience shows that the minimum value is 2 GB, but if you want to work comfortably in the new OS X, it is better to have 4 GB of memory on board. If your Mac has only 1 GB of RAM installed, we recommend that you upgrade by hardware and increase the RAM if possible.

    In Lion or Mountain Lion, you can check the specifications of your Mac in the About This Mac window, which is available in Finder. Snow Leopard Users Can Use MacTracker Utility

    Not sure how much RAM or capacity your hard drive has on your Mac? This information can be viewed by clicking on the Apple menu, in the "About This Mac" window, selecting "Details". In Lion and Mountain Lion, the “Learn more about this Mac” item by default displays your computer model and year of release, as well as the amount and frequency of RAM. To view the details of your RAM in detail, click on the "Memory" tab. To view information about free space on your hard drive, select the "Storage" tab.

    In Snow Leopard, for this you need to go to System Profile, select the Memory tab or Serial-ATA to view data on RAM and hard disk, respectively.

    Unfortunately, the Snow Leopard system in the Profiler window does not display the actual model and year of release of your Mac. Nevertheless, the excellent MacTracker program will allow you to get this information.

    To install Mavericks, you will need OS X 10.6.8 and newer versions of the operating system (including any release builds 10.7 and 10.8). The main reason for this limitation is that Mavericks, like Lion, Mountain Lion will be distributed through the Mac App Store, which has been available on OS X since version 10.6.6, but Apple recommends using 10.6.8 so that everyone went smoothly.

    In addition, Cupertinians advise installing the latest updates for the operating system, so be sure to check for updates for your OS X.

    What if your Mac is compatible with OS X Mavericks but works on old OS X 10.5? The easiest way is to buy Snow Leopard for $ 20 and upgrade to Mavericks from it - you will pay quite reasonable money for really large updates to your OS X.

    We strongly recommend that you get Magic Trackpad if you still don’t have it - starting with Leo, OS X is well tuned for controlling the trackpad, and it’s much better to use it, rather than a mouse or other input device. MacBook owners, of course, do not need to buy a trackpad.

    Before installation

    Despite the fact that Apple calls updating OS X a fairly simple process of downloading and installing software, not everything goes so smoothly. Therefore, we advise you to complete the following tasks before installing a new “axis”.

    Make sure your Mac system drive is in good condition. To do this, open the disk utility (Applications> Utilities), select the boot disk from the list on the left, click on the "First Aid" tab, and then on the "Check" button. If the disk utility detects any problems, you will have to boot from another volume in order to fix the problems with the "Fix Disk" button. If you are upgrading from Lion or Moutian Lion and your Mac can use OS X in Recovery mode, then you can boot into recovery mode (Ctrl + R during Mac startup) and use the disk utility to solve problems directly there.

    In addition, if you created the Mountian Lion bootable installation disk, or the Lion bootable disk for old or new Macs, or created a separate recovery disk, you can boot from one of these volumes and use Disk Utility from there. If you are upgrading from Snow Leopard, then you can use the disk utility from the supplied installation disc or OS X Snow Leopard flash drive.

    OS X Disk Utility Checks the Status of Your Boot Disk

    If you are not confident in your abilities, then you can use the special Apple Hardware Test or Apple Diagnostics utilities, which were released recently.

    Make a backup of your Mac and check it. Do not neglect this item, because in case of trouble, it can save you the life of your data from the Mac. You can back up with SuperDuper or Carbon Copy Cloner, although you can do with the standard Time Machine. Each method has its own advantages: backing up using third-party utilities will allow you to immediately return to work if you encounter problems, and Time Machine saves several versions of the documents you worked with. It is recommended that you use these two methods in conjunction.

    To check your backup for “lice”, use the disk launch panel in System Preferences. This will allow you to check whether everything works on the backup drive as if you were booting from a standard Macintosh drive or not. Чтобы проверить Time Machine, попробуйте восстановить несколько старых и новых версий документов, с которыми вы работали.

    Только для пользователей Snow Leopard: отключите FileVault. Если вы обновляетесь со Snow Leopard (OS X 10.6) и используете встроенный инструмент шифрования FileVault, то прежде чем обновляться до Mavericks, рекомендуется отключать эту функцию. Это связано с тем, что Mavericks, Lion и Mountain Lion используют более новый алгоритм шифрования данных FileVault 2. Так что, не стоит испытывать судьбу на совместимость между двумя этими алгоритмами шифрования данных. Отключите старый FileVault на Snow Leopard перед установкой Mavericks и уже после успешной загрузки запустите FileVault 2 в системных настройках.

    Отключите сторонние алгоритмы шифрования диска. Тоже самое касается и тех, кто использует сторонние решения для шифрования данных на диске. Прежде чем устанавливать новую OS X, отключите их, иначе обновление может закончиться для вас плачевно. Только после того, как вы установите Mavericks и убедитесь в его работоспособности, вы можете вновь включить сторонние алгоритмы шифрования данных. Но учитывайте, что встроенный FileVault 2 справляется с этим ничем не хуже.

    Вы можете проверить наличие обновлений ОС при помощи Mac App Store

    Check for Apple system updates and embedded applications. To make sure that you are using the latest software and applications from Apple, go to the Mac App Store in the "Updates" tab and check if the software requires updates. This is necessary so that all programs run correctly on the new OS X and there are no problems with application compatibility. In Lion and Mountain Lion, you can use the “Software Update” item on the Apple menu to do this. Also, be sure to check that the firmware for your Mac is the latest.

    Check if third-party application updates are compatible with Mavericks. When OS X receives big updates, you need to make sure that the third-party applications you use are capable of running the new version of the operating system. It’s better to immediately make sure that your programs are updated to the latest versions and work correctly in Mavericks, so that after installation you will be disappointed in broken applications.

    To check compatibility, you can visit the website of each specific application developer, but it’s better and easier to use the special list of compatible programs compiled by RoaringApps. The list includes columns for various versions of OS X - be sure to check the Mavericks column.

    If the check showed the availability of a more recent version of the application, then update. For applications downloaded from the Mac App Store, it’s very simple - click on the “Updates” tab and download updates for such programs.

    For applications not downloaded from the Mac App Store, you will have to install the updates yourself. Some programs include the function of automatically checking for updates - if this function is not available, you will have to visit the developer's site and download the latest version of the application directly from there.

    List of compatible applications with different versions of OS X on RoaringApps

    When it comes to software incompatible with the new OS X, the most problems will arise with those applications that integrate with the system at the so-called "low" level. The expanded kernel of the OS and updating to the new OS X are incompatible things, everything can end badly. True, some of the applications will most likely work correctly, but overall this is not the best option.

    For Snow Leopard users only: check out really old programs. If you are still working on Snow Leopard, you may have several PowerPC-compatible programs that do not run on Macs with Intel processors. In Snow Leopard and earlier versions of OS X, Apple provided the Rosetta utility, which allowed you to transform the code of PowerPC-compatible applications for running under Intel. In Snow Leopard this utility is not installed by default, Mac will offer you to download it only when you open some PowerPC-compatible application. Note that in OS X 10.7 and later, Rosetta cannot be installed at all.

    Any PowerPC application for Mavericks will not work, so if you have a really important PowerPC application, do not forget to make it Intel compatible. Or find acceptable, more modern alternatives. As a last resort, you can leave the old OS X to run such programs in it.

    To check the installed PowerPC-compatible applications, use the Profiler utility (Applications> Utilities), and then click on the View column, which can sort applications by the type of compatible processor. Do not forget that no PowerPC-compatible program in Mavericks, Lion and Mountain Lion work will not be.

    Set up your iCloud account. The iCloud cloud synchronization service is integrated into many components of OS X. So, to avoid problems, make sure. that you’ve logged in with your iCloud account and enabled it to sync different types of data. If you are upgrading from Snow Leopard, then get yourself an iCloud account right away, as you install Mavericks.

    Get an extra drive. It will never be superfluous to have another drive in reserve on which you can install the OS. For example, you can first install Mavericks on a second disk to test the new OS X. This is especially true if for some reason your main disk is damaged. In general, having an extra drive will never be redundant.

    Congratulations - you are fully prepared to upgrade to Mavericks

    Thanks to the Mac App Store, the OS X update process is simple and you no longer need to use CDs or flash drives to install new software. Now that your Mac is fully and correctly ready to upgrade to OS X 10.9, you just have to wait for the final version of Mavericks to be released on the App Store. Apparently, this will happen very soon.

    We hope that this guide will help you properly configure and prepare your Mac for updating to the new OS X. If you have any questions or additions - leave them in the comments, we will be glad to hear your suggestions. Stay on MacRadar - it will only be more interesting.

    Leopard minimum system requirements:

    • Intel or PowerPC G4 or G5 processor at 867 MHz or higher
    • DVD drive
    • 512 MB RAM
    • 9 GB of hard disk space

    If you have an old PowerPC Mac that you want to completely upgrade, put the 10.5 Leopard DVD into the drive and follow the instructions. Leopard is the latest version of OS X that supports PowerPC Macs, so it’s nice to have this latest version. However, you can no longer work on your Mac until you get a newer Intel-based machine.

    If you have an early Intel-based Mac, it’s wiser to skip Leopard and go straight from Lion to Snow Leopard if you accept the memory and hard drive requirements.

    Snow Leopard System Requirements:

    • Intel Mac
    • 1 GB RAM
    • 5 GB of hard disk space
    • DVD drive

    Snow Leopard is the latest version of OS X, available strictly on DVD. This DVD is also the only way for Macs with older versions of OS X to access the Mac App Store and update it with Snow Leopard. If you have an Intel Mac, just put the Snow Leopard DVD in the drive and follow the update instructions.

    As we said earlier, if you still have a Power PC Mac, you are stuck on 10.5 Leopard since it was the latest version officially supporting Macs that are incompatible with Intel.

    Please note that 10.6 Snow Leopard is the minimum version to run our Mac optimization application,. Therefore, upgrading to Snow Leopard is wise!


    Lion System Requirements:

    • 64-bit Intel Mac
    • 2 GB RAM
    • OS X 10.6.6 or later
    • 7 GB of hard disk space

    You cannot upgrade from the earliest version of Snow Leopard to Lion. You must patch Snow Leopard before 10.6.6 first on the Apple website (and Apple recommends going to 10.6.8). This is because 10.6.6 is the first version of OS X to introduce the Mac App Store, which allows online updates from Mac in major versions. Prior to this, you could upgrade the same version of OS X through the Apple Support website on your website, but you could not upgrade to the next major version without a DVD.

    And actually there are no DVDs for 10.7 Lion and later versions of OS X. You need to upgrade the digital version or not at all what 10.6.6 means, the earliest version to support the Mac App Store, also the earliest version that can update digitally to the latest version of OS X.

    However, you first need to save 10.6.6 or 10.6.8 through the Apple support website. Once you do this and you have the Mac App Store installed, go there for an update. In fact, you can no longer upgrade to Lion, as it has been removed from the Mac App Store since July 2012. You must upgrade directly to Mountain Lion. If you already have Lion installed and need to reinstall it, hold Option and go to the " Acquired »On the Apple Mac Store to see the download link again.


    Mountain Lion System Requirements:

    • 2 GB RAM
    • 8 GB of hard disk space
    • OS X 10.6.8 or later

    The earliest Mac models were supported: Mid-2007 iMac, late 2008 or early 2009 MacBook, mid 2007 MacBook Pro, late 2008 MacBook Air, early 2009 Mac Mini or early 2008 Mac Pro

    If you have a system that meets the above specifications, you can upgrade your Mac from Lion to Mountain Lion (or even from a later version of Snow Leopard to Mountain Lion) through the Mac App Store. It will cost $ 19.99 US, with different prices for other regions.


    Upgrade from 10.8 Mountain Lion to 10.9 Mavericks

    The system requirements of Mavericks are almost the same as Mountain Lion. It should be released by the end of 2013, but the release date has not yet been announced. Just like upgrading to Mountain Lion, upgrading to Mavericks will be through the Mac App Store and will probably cost $ 19.99, with different prices for other regions.


    MacReviver includes all the necessary tools to help you clean, optimize and save your Mac and restore its performance and stability.

    download now

    its new desktop OS OS 10.9 Mavericks. Most likely, this assembly will become final and will soon be available to all for download from the Mac App Store. Mavericks' release is just around the corner, so the time has come to properly prepare your Mac for an upgrade to fresh OS X. Read our material on how to do it right.

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