If you have an old Mac and you need to reinstall MacOS, or if you want to return to a previous version of the operating system.This article will guide step by step in this process. Before starting, it is important to need some limitations to avoid problems during installation and prepare your Mac correctly.

Remember, although this does not eliminate the warranty of your Mac, If you can do irreparable damageIt is a personal risk to do this process and each must think.

• You may also be interested in reading: How to transfer a file between MAC and Windows by Bluetooth

Can I install the MacOS version on my Mac?

All MacOS versions are not compatible with all Mac models. The latest models cannot install before a version before a previously installed for the proper operation of the operating system.

For example, If you have a Mac Book Pro M4 (released in 2024), you can install only 15 sequoia or later versions. If you try to install an earlier version, the system simply works.

To verify which version of MacOS is compatible with your team:

• Click the Apple logo in the upper left corner.
• Select “about this Mac”.
• Look for the full model and share it with the MacOS version on the Apple support site.

How to download previous versions of MacOS

Apple allows you to download the old versions of MacOS from Mac App Store OA through direct links on the website.. However, these versions are not visible in the search in the App Store, so you need to access them from the following official links:

MacOS versions at Mac App Store:

• MacOS Sequoia (2024)
• Sonoma MacOS (2023)
• MacOS Ventura (2022)
• MacOS Montrey (2021)
• MacOS Big Sur (2020)
• MacOS Catalina (2019)
• MacOS Mojave (2018)
• MacOS High Sierra (2017)

Previous versions on the Apple website:

• Mac OS X Mountain Lion (2012)
• Mac OS X Lion (2011)

When you need the MacOS version you need, do not run the installer immediately. Instead, leave in the applications folder, as it will be necessary to create a USB start. In the meantime, we do not forget that there is no safe download for Mavericks, Sierra, Captain or Yosemite.

You can officially install almost every MacOS, but you need to examine the compatibility according to your processor.

How to create a USB starting unit

To install a previous version of MacOS, You will need a USB unit at least 14 GB of free space. If you plan to do this with older versions such as Catalina or Sierra, 8 GB units may be enough.

Step 1: Format the USB unit

• Connect the USB unit to your Mac.
• Open Discs Auxiliary Program (Applications> You can find in auxiliary programs).
• Select the USB unit in the edge bar and click “Delete”.
• Give a page as “macOS_Installer” to facilitate the steps below.
• Select the Mac OS Expanded Format (Journoldo) and click “Delete”.

Step 2: Create USB starting from the terminal

• Open the Terminal (Applications> Auxiliary Programs) and enter the following command depending on the MacOS version you install.
• For example, if you are going to install MacOS Sequoia, use this command:

Sudo/Applications/Installation \ MacOS \ sequoia.app/contenidos/recursos/createinstledia -Volume/volumes/macos_Installer

• MacOS High Sierra, if you need to install the USA:

Sudo/Applications/Installation \ MacOS \ High \ Sierra.App/contes/resources/createinstlediA -Volume/Volumes/MacOS_Installer

After running the command, Enter your administrator password and press the “and” key.. This will copy the required files to the USB unit.

• You may also be interested in reading: A MacBook: Screen, Keyboard and Housing How to Clean correctly

How to install macOS from a USB unit

After preparing Boot USB, follow these steps to reinstall MacOS in your Mac:

• Place the USB unit in Mac and Apágala.
• Apple silicone Mac (M1 or higher): Press and hold the ignition button until the start options window appears. Then select USB and click “Continue”.
• Mac with Intel Processor: Keep the option (Alt) when the starting volume list appears.

Format the album before installing MacOS:

• In the installation window, select the registration auxiliary program.
• Choose the album to install MacOS (usually “Macintosh HD”).
• Click “Delete”, select the APFS format (for Sierra MacOS or subsequent versions) or Mac OS Extended (Journold) (for previous versions).
• Confirm the action and close the benefits of the discs.

Install MacOS:

• Select “Rein Install MacOS” and follow the screen instructions.
• Wait for the process to end. This can take 30 minutes to 2 hours depending on your Mac model.

Alternative: Rest a Mac with Apple Silicone Chip

If your Mac has M1 or more new chips, You can restore it in factory values ​​without the need for USB. To do this:

• Go to “system configuration”> “General”> “Transfer or Restore”.
• Click “Delete Content and Configuration”.
• Follow the screen instructions to restore your Mac without manually reinstalling it.

When is it recommended to reinstall MacOS?

• If you have an old Mac and the latest version of MacOS is no longer compatible.
• If your Mac has performance problems and can improve a clean installation work.
• If you want to sell or donate your Mac and you need to restore it to its original state.
• If you’ve tried the beta version of MacOS and want to return to a stable version.

You can follow iPadizat Whatsapp on Facebook, Twitter (x) Or consult our Telegram channel to be up -to -date with the latest technology news.