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Bootable Installer for macOS: How to Create One Using an External Drive or Secondary Volume



How to Download macOS for Your Mac




macOS is the operating system that powers every Mac. It lets you do things you simply cant with other computers. Thats because its designed specifically for the hardware it runs on and vice versa.


Downloading macOS for your Mac can help you keep your computer's security, stability, and compatibility up to date. It can also give you access to the latest features and built-in apps that make your Mac more powerful and enjoyable.




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In this article, we'll show you how to download macOS for your Mac using different methods. Whether you want to update your current macOS version or install a previous one, we'll guide you through the process step by step.


How to Use Software Update to Download macOS




One of the easiest ways to download macOS for your Mac is to use Software Update. This method is faster and easier than other methods, and it might require less storage space to download and install the upgrade.


Software Update shows only upgrades that are compatible with your Mac. You don't have to worry about downloading an incompatible version of macOS that might cause problems with your Mac. You can also choose to install the upgrade automatically or manually, depending on your preference.


To use Software Update to download macOS for your Mac, follow these steps:


  • Choose System Preferences from the Apple menu, then click Software Update to check for updates.



  • If any updates are available, click the Update Now button to install them. Or click More info to see details about each update and select specific updates to install.



  • When Software Update says that your Mac is up to date, the installed version of macOS and all of its apps are also up to date. That includes Safari, Music, Photos, Books, Messages, Mail, Calendar, and FaceTime.



For more details on how to use Software Update to download macOS for your Mac, visit .


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How to Use the App Store or Your Browser to Download macOS




Another way to download macOS for your Mac is to use the App Store or your browser. This method might require more storage space to download and install the upgrade, but it allows you to download previous versions of macOS that are not available through Software Update.


You might want to download a previous version of macOS if you have an older Mac that is not compatible with the latest version, or if you need to use certain apps or features that are not supported by the latest version.


To use the App Store or your browser to download macOS for your Mac, follow these steps:


  • Choose App Store from the Apple menu, then find the macOS version you want to download. Or open Safari or another browser and go to that lists all the versions of macOS that you can download from the App Store or your browser.



  • Click the Download button for the macOS version you want. If you don't see a Download button, it means that the version is not compatible with your Mac.



  • After downloading, the installer opens automatically. Click Continue and follow the onscreen instructions. You might be asked to enter your administrator password.



For more details on how to use the App Store or your browser to download macOS for your Mac, visit . How to Create a Bootable Installer for macOS




Sometimes, you might want to create a bootable installer for macOS. A bootable installer is a device that contains a copy of the macOS installer that you can use to install macOS on any compatible Mac without an internet connection or additional downloads.


You might need a bootable installer if you want to install macOS on multiple Macs, or if you want to have a backup installer in case of an emergency. You can also use a bootable installer to erase your Mac and reinstall macOS from scratch.


To create a bootable installer for macOS, you need two things: an external drive or a secondary volume on your Mac that has at least 12GB of available storage space, and an installer for OS X El Capitan or later that you can download from the App Store or your browser.


To create a bootable installer for macOS, follow these steps:


  • Connect the external drive or secondary volume to your Mac. If the drive is formatted for Windows, you need to erase it and format it as Mac OS Extended (Journaled) using Disk Utility.



  • Open Terminal from the Utilities folder of your Applications folder.



  • Type or paste one of the following commands in Terminal. These commands will erase the external drive or secondary volume and create the bootable installer. Make sure to replace MyVolume with the name of your drive or volume.



macOS versionTerminal command


macOS Montereysudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


macOS Big Sursudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


macOS Catalinasudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


macOS Mojavesudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


macOS High Sierrasudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


macOS Sierrasudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app


OS X El Capitansudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app


  • Press Return after typing the command.



  • When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.



  • When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the bootable installer is created.



  • When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Monterey. You can now quit Terminal and eject the volume.



For more details on how to create a bootable installer for macOS, visit . How to Troubleshoot Downloading Issues




Sometimes, you might encounter some errors or problems when downloading macOS for your Mac. These issues can prevent you from completing the download or installing the upgrade successfully.


Fortunately, most of these issues can be fixed easily by following some simple tips. Here are some of the most common downloading issues and how to troubleshoot them:


  • If you see a message that says "This copy of the Install macOS application is too old to be opened on this version of macOS", it means that the installer you downloaded is not compatible with your current macOS version. To fix this, you need to delete the installer from your Applications folder and download a newer version from the App Store or your browser.



  • If you see a message that says "An error occurred while preparing the installation. Try running this application again", it means that there was a problem with verifying the installer. To fix this, you need to check the date and time settings on your Mac and make sure they are correct. You can also try restarting your Mac and running the installer again.



  • If you see a message that says "macOS could not be installed on your computer", it means that there was a problem with installing the upgrade. To fix this, you need to check the compatibility of your Mac and make sure it meets the minimum requirements for the macOS version you want to install. You can also try repairing your disk using Disk Utility or reinstalling macOS from Recovery Mode.



  • If you see a message that says "The requested version of macOS is not available", it means that the macOS version you want to download is no longer available from Apple. To fix this, you need to choose a different macOS version that is still available from the App Store or your browser.



  • If you see a message that says "There is not enough free space on Macintosh HD to install", it means that your Mac doesn't have enough storage space to download and install the upgrade. To fix this, you need to free up some space by deleting unwanted files, emptying the Trash, or using storage optimization tools.



For more help with troubleshooting downloading issues, visit .


Conclusion




Downloading macOS for your Mac is an important task that can improve your computer's performance and functionality. It can also give you access to new features and apps that enhance your user experience.


In this article, we showed you how to download macOS for your Mac using different methods. You can use Software Update, the App Store, or your browser to download the latest or previous versions of macOS. You can also create a bootable installer for macOS if you want to install it on multiple Macs or have a backup installer in case of an emergency.


We hope this article was helpful and informative. If you have any questions or feedback, please let us know in the comments below. And don't forget to share this article with your friends and family who might find it useful.


FAQs




Q: How do I check which macOS version I have?




A: You can check which macOS version you have by choosing About This Mac from the Apple menu. You'll see the name and version number of your macOS, as well as other information about your Mac.


Q: How do I update my apps after downloading macOS?




A: You can update your apps after downloading macOS by opening the App Store and clicking Updates in the sidebar. You'll see a list of apps that have updates available. You can click Update All to install all updates, or click Update next to each app to install individual updates.


Q: How do I use a bootable installer to install macOS?




A: You can use a bootable installer to install macOS by following these steps:


  • Connect the bootable installer to a compatible Mac.



  • Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk.



  • After your Mac starts up from the bootable installer, follow the onscreen instructions to install macOS.



Q: How do I download older versions of macOS that are not listed on Apple Support?




A: You can download older versions of macOS that are not listed on Apple Support by using Internet Recovery Mode. This mode allows you to reinstall the original macOS version that came with your Mac, or the closest version still available. To use Internet Recovery Mode, follow these steps:


  • Shut down your Mac, then turn it on and immediately press and hold Option-Command-R until you see a spinning globe or an Apple logo.



  • When you see a screen asking to select a Wi-Fi network, select one or connect to Ethernet. If you don't see this screen, it means your Mac is not compatible with Internet Recovery Mode.



  • When you see the Utilities window, choose Reinstall macOS (or Reinstall OS X) from the Utilities window, then click Continue and follow the onscreen instructions.



Q: How do I back up my Mac before downloading macOS?




A: You can back up your Mac before downloading macOS by using Time Machine. Time Machine is a built-in feature that automatically backs up your entire Mac, including system files, apps, music, photos, emails, and documents. To use Time Machine, follow these steps:


  • Connect an external hard drive to your Mac. If you don't have one, you can buy one from Apple or other retailers.



  • When you see a message asking if you want to use the drive to back up with Time Machine, click Use as Backup Disk. If you don't see the message, open System Preferences, click Time Machine, then select the drive as the backup disk.



  • Time Machine will start making periodic backups automatically. The first backup may take a long time, depending on how many files you have. You can continue using your Mac while the backup is in progress.



For more details on how to back up your Mac before downloading macOS, visit . 44f88ac181


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